Total KJV occurrences: 34
[/INDENT]Like in the case of Acts 2, they were to repent of having denied Jesus Christ and having Him killed.
Act 2:22-24 KJV Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know: (23) Him, being delivered by the determinate counsel and foreknowledge of God, ye have taken, and by wicked hands have crucified and slain: (24) Whom God hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it.
Act 2:36-39 KJV Therefore let all the house of Israel know assuredly, that God hath made that same Jesus, whom ye have crucified, both Lord and Christ. (37) Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? (38) Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. (39) For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.
When they were told of THEIR murder of Jesus Christ, they were pricked in their heart and told to repent of that murder and denial and be baptized.