Romans 11:29 For the gifts and calling of God are without repentance.
Ephesians 1:18 The eyes of your understanding being enlightened; that ye may know what is the hope of his calling, and what the riches of the glory of his inheritance in the saints,
Ephesians 4:14 That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;
Ephesians 2:5 Even when we were dead in sins, hath quickened us together with Christ, by (grace ye are saved;)
Romans 10:9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
Romans 10:10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
It is not by repentance that we are saved and it is not by works either as it is by Gods grace which is unmerited favor as God is willing to give us his power and authority even though we do not deserve it. It is by faith, even as weak as it is in the beginning of our relationship with Jesus, that brings us to repentance when we first confess that Jesus is Lord by believing God raised him from the dead.