Bible Verses About Repentance: Necessary to the pardon of sin

Then Peter said vnto them, Amend your liues, and bee baptized euery one of you in the Name of Iesus Christ for the remission of sinnes: and ye shall receiue the gift of the holy Ghost.

Amend your liues therefore, and turne, that your sinnes may be put away, whe the time of refreshing shall come from the presence of the Lord.

Repent therefore of this thy wickednes, and pray God, that if it be possible, the thought of thine heart may be forgiuen thee.