is,

To feel sorrow, pain, or regret over something you have done or left undone; to be sorry for these sins, ask forgiveness of God, and then turn away from that behavior and do right.

...I am not come to call the righteous, but sinners to repentance...
Matthew 9:13

...except ye repent, ye shall all likewise perish.
Luke 13:3

For all have sinned, and come short of the glory of God...
Romans 3:23