We are speaking of John the Baptist, but not reincarnation:
Luke 1:13 But the angel said to him, "Do not be afraid, Zacharias, for your petition has been heard, and your wife Elizabeth will bear you a son, and you will give him the name John.
Luke 1:17 "It is he who will go as a forerunner before Him in the spirit and power of Elijah, TO TURN THE HEARTS OF THE FATHERS BACK TO THE CHILDREN, and the disobedient to the attitude of the righteous, so as to make ready a people prepared for the Lord."
Malachi 4:5 "Behold, I am going to send you Elijah the prophet before the coming of the great and terrible day of the LORD.
Malachi 4:6 "He will restore the hearts of the fathers to their children and the hearts of the children to their fathers, so that I will not come and smite the land with a curse."