1 John 1:8-10

If we say that we have no sin, we deceive ourselves, and the truth is not in us.

Matthew 3:6-10

and were baptized by him in the river Jordan, confessing their sins.

Matthew 23:25-28

Woe to you, scribes and Pharisees, hypocrites! for ye make clean the outside of the cup and the platter, but within they are full of robbery and licentiousness.

Matthew 27:4-5

saying, I sinned in betraying innocent blood. And they said, What is that to us? See thou to it.

Luke 15:18-24

I will arise and go to my father, and will say to him, Father, I have sinned against Heaven and before thee;

Acts 26:20

but first to those in Damascus, and Jerusalem, and to all the country of Judaea, and then to the gentiles, I proclaimed that they should repent and turn to God, doing works worthy of repentance.

Treasury of Scripture Knowledge

Summary

He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy.

Bible References

That

Matthew 23:25
Woe to you, scribes and Pharisees, hypocrites! for ye make clean the outside of the cup and the platter, but within they are full of robbery and licentiousness.

Whoso

Luke 15:18
I will arise and go to my father, and will say to him, Father, I have sinned against Heaven and before thee;
1 John 1:8
If we say that we have no sin, we deceive ourselves, and the truth is not in us.

And forsaketh

Matthew 3:6
and were baptized by him in the river Jordan, confessing their sins.
Matthew 27:4
saying, I sinned in betraying innocent blood. And they said, What is that to us? See thou to it.
Acts 26:20
but first to those in Damascus, and Jerusalem, and to all the country of Judaea, and then to the gentiles, I proclaimed that they should repent and turn to God, doing works worthy of repentance.