Acts 26:20

but declared first to those in Damascus and Jerusalem, and through all the country of Judea, and then to the Gentiles, that they should repent, and turn unto God, performing works suitable to repentance.

James 4:8-9

Draw near to God, and He will draw near to you: cleanse your hands, O sinners, and purify your hearts, ye double minded.

Treasury of Scripture Knowledge

Summary

Therefore also now, saith the LORD, turn ye even to me with all your heart, and with fasting, and with weeping, and with mourning:

With fasting

Bible References

With fasting

James 4:8
Draw near to God, and He will draw near to you: cleanse your hands, O sinners, and purify your hearts, ye double minded.