Luke 6:41

And why do you look at the speck in your brother's eye, but do not notice the plank in your own eye?

John 8:7

And when they continued to ask him, he stood up and said to them, "Let him who is without sin among you be the first to throw a stone at her."

Matthew 7:3-5

And why do you look at the speck in your brother's eye, but do not consider the plank in your own eye?

John 8:40-44

but now you seek to kill me, a man who has told you the truth which I heard from God. This is not what Abraham did.

Romans 2:1

Therefore you have no excuse, O man, whoever you are who judge another; for in whatever point you pass judgment on him you condemn yourself, because you, the judge, are doing the very same things.

Romans 2:21-24

you, then, who teach others, do you not teach yourself? You who preach against stealing, do you steal?

James 1:24

for he looks at himself and goes away, and immediately forgets what he was like.

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 speck in your brother's eye, but do not consider the plank in your own eye?
Romans 2:1
Therefore you have no excuse, O man, whoever you are who judge another; for in whatever point you pass judgment on him you condemn yourself, because you, the judge, are doing the very same things.

But

John 8:7
And when they continued to ask him, he stood up and said to them, "Let him who is without sin among you be the first to throw a stone at her."
James 1:24
for he looks at himself and goes away, and immediately forgets what he was like.