Acts 19:18

Many also of those who believed came confessing without reserve what their conduct had been,

Matthew 3:6

and were baptized by him in the Jordan, making full confession of their sins.

Romans 10:10

For with the heart men believe and obtain righteousness, and with the mouth they make confession and obtain salvation.

1 John 1:9

If we confess our sins, He is so faithful and just that He forgives us our sins and cleanses us from all unrighteousness.

Treasury of Scripture Knowledge

Summary

And many that believed came, and confessed, and shewed their deeds.

Bible References

Confessed

Matthew 3:6
and were baptized by him in the Jordan, making full confession of their sins.
Romans 10:10
For with the heart men believe and obtain righteousness, and with the mouth they make confession and obtain salvation.
1 John 1:9
If we confess our sins, He is so faithful and just that He forgives us our sins and cleanses us from all unrighteousness.