Luke 6:41

And why do you look at the splinter that is in your brother's eye, but perceive not the beam that is in your own eye?

John 8:7

But as they continued to ask him, he stood up, and said to them: Let him among you who is without sin, first throw a stone at her.

Matthew 7:3-5

And why do you look at the splinter that is in your brother's eye, but perceive not the beam that is in your own eye?

John 8:40-44

But now you seek to kill me, a man that has spoken to you the truth, which I have heard from God; this Abraham did not.

Romans 2:1

For which reason, you are without excuse, man, who ever you are, that judge; for in that in which you judge an other, you condemn yourself; for you who judge, practice the same things.

Romans 2:21-24

you, then, who teach another, do you not teach yourself? You who preach that a man should not steal, do you steal?

James 1:24

for he looks at himself, and goes away, and immediately forgets what sort of person he is.

Treasury of Scripture Knowledge

Summary

And why beholdest thou the mote that is in thy brother's eye, but perceivest not the beam that is in thine own eye?

Bible References

Why

Matthew 7:3
And why do you look at the splinter that is in your brother's eye, but perceive not the beam that is in your own eye?
Romans 2:1
For which reason, you are without excuse, man, who ever you are, that judge; for in that in which you judge an other, you condemn yourself; for you who judge, practice the same things.

But

John 8:7
But as they continued to ask him, he stood up, and said to them: Let him among you who is without sin, first throw a stone at her.
James 1:24
for he looks at himself, and goes away, and immediately forgets what sort of person he is.