Regarding Saul and that witch, when its ENTIRE narrative is consulted, it is obvious that after Saul went about cleaning the swamp of witches, etc., that had obviously been allowed under Samuel, he then turned against God once more, when he turned to that witch, and by that further angered God for that, and paid dearly for it.
The ordinance under Moses had been to drive those out who were suspected of divination, but to kill those caught practicing it.
Even the witch had known that she was to be put to death should she be found practicing her abomination and reminds Saul of this.
To which he responds not only by going against Moses on that, but by taking the LORD's Name in vain, basing his promise to the witch that she will not be put to death, on God.
In the end, Saul kills himself, just like every other suicide in Scripture - each in connection with some sort of a having departed from Moses (The Law of the LORD, Luke later refers to it as, in Luke 2:39).
For as the following shows, by his having turned to that witch, Saul ended up making his already being faced with overwhelming odds - WITHOUT God - even worse...
Why?
Leviticus 20:6 And the soul that turneth after such as have familiar spirits, and after wizards, to go a whoring after them, I will even set my face against that soul, and will cut him off from among his people.
Nope, I'm not buying the notion that after God turned His back on Saul such that He cut off all communications (signs, visions, prophets) He then used a means of communicating He repeatedly instructs Israel, is an abomination unto Him.
Scripture is clear on this issue...
Deuteronomy 18:9 When thou art come into the land which the LORD thy God giveth thee, thou shalt not learn to do after the abominations of those nations. 18:10 There shall not be found among you any one that maketh his son or his daughter to pass through the fire, or that useth divination, or an observer of times, or an enchanter, or a witch. 18:11 Or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer. 18:12 For all that do these things are an abomination unto the LORD: and because of these abominations the LORD thy God doth drive them out from before thee. 18:13 Thou shalt be perfect with the LORD thy God. 18:14 For these nations, which thou shalt possess, hearkened unto observers of times, and unto diviners: but as for thee, the LORD thy God hath not suffered thee so to do. 18:15 The LORD thy God will raise up unto thee a Prophet from the midst of thee, of thy brethren, like unto me; unto him ye shall hearken;
In contrast to that, first we read...
1 Samuel 28:3 Now Samuel was dead, and all Israel had lamented him, and buried him in Ramah, even in his own city. And Saul had put away those that had familiar spirits, and the wizards, out of the land.
But then we read of his turning in his obvious unbelief and impatience, against that momentary right course on his part, to an abomination...
1 Samuel 28:5 And when Saul saw the host of the Philistines, he was afraid, and his heart greatly trembled. 28:6 And when Saul enquired of the LORD, the LORD answered him not, neither by dreams, nor by Urim, nor by prophets. 28:7 Then said Saul unto his servants, Seek me a woman that hath a familiar spirit, that I may go to her, and enquire of her. And his servants said to him, Behold, there is a woman that hath a familiar spirit at Endor.
Later, on, in the passages I am citing, we'll find that God judged him severely for his having done that. But moving on, we read...
1 Samuel 28:8 And Saul disguised himself, and put on other raiment, and he went, and two men with him, and they came to the woman by night: and he said, I pray thee, divine unto me by the familiar spirit, and bring me him up, whom I shall name unto thee. 28:9 And the woman said unto him, Behold, thou knowest what Saul hath done, how he hath cut off those that have familiar spirits, and the wizards, out of the land: wherefore then layest thou a snare for my life, to cause me to die? 28:10 And Saul sware to her by the LORD, saying, As the LORD liveth, there shall no punishment happen to thee for this thing.
Not true, Saul.
Leviticus 20:27 A man also or woman that hath a familiar spirit, or that is a wizard, shall surely be put to death: they shall stone them with stones: their blood shall be upon them.
Also...
Deuteronomy 5:11 Thou shalt not take the name of the LORD thy God in vain: for the LORD will not hold him guiltless that taketh his name in vain.
Result?
Saul made a very bad situation even worse for himself, by his further transgression against God, in his having turned to that witch...
1 Samuel 31:1 Now the Philistines fought against Israel: and the men of Israel fled from before the Philistines, and fell down slain in mount Gilboa. 31:2 And the Philistines followed hard upon Saul and upon his sons; and the Philistines slew Jonathan, and Abinadab, and Melchishua, Saul's sons. 31:3 And the battle went sore against Saul, and the archers hit him; and he was sore wounded of the archers. 31:4 Then said Saul unto his armourbearer, Draw thy sword, and thrust me through therewith; lest these uncircumcised come and thrust me through, and abuse me. But his armourbearer would not; for he was sore afraid. Therefore Saul took a sword, and fell upon it. 31:5 And when his armourbearer saw that Saul was dead, he fell likewise upon his sword, and died with him. 31:6 So Saul died, and his three sons, and his armourbearer, and all his men, that same day together. 31:7 And when the men of Israel that were on the other side of the valley, and they that were on the other side Jordan, saw that the men of Israel fled, and that Saul and his sons were dead, they forsook the cities, and fled; and the Philistines came and dwelt in them. 31:8 And it came to pass on the morrow, when the Philistines came to strip the slain, that they found Saul and his three sons fallen in mount Gilboa. 31:9 And they cut off his head, and stripped off his armour, and sent into the land of the Philistines round about, to publish it in the house of their idols, and among the people. 31:10 And they put his armour in the house of Ashtaroth: and they fastened his body to the wall of Bethshan. 31:11 And when the inhabitants of Jabeshgilead heard of that which the Philistines had done to Saul; 31:12 All the valiant men arose, and went all night, and took the body of Saul and the bodies of his sons from the wall of Bethshan, and came to Jabesh, and burnt them there. 31:13 And they took their bones, and buried them under a tree at Jabesh, and fasted seven days.
1 Chronicles 10:13 So Saul died for his transgression which he committed against the LORD, even against the word of the LORD, which he kept not, and also for asking counsel of one that had a familiar spirit, to enquire of it; 10:14 And enquired not of the LORD: therefore he slew him, and turned the kingdom unto David the son of Jesse.
In this, Isaiah's words come to mind...
Isaiah 8:18 Behold, I and the children whom the LORD hath given me are for signs and for wonders in Israel from the LORD of hosts, which dwelleth in mount Zion. 8:19 And when they shall say unto you, Seek unto them that have familiar spirits, and unto wizards that peep, and that mutter: should not a people seek unto their God? for the living to the dead? 8:20 To the law and to the testimony: if they speak not according to this word, it is because there is no light in them.
Romans 5:6-8, in each, our stead.