Luke 6:41

"And why look at the splinter in your brother's eye instead of giving careful attention to the beam in your own?

John 8:7

When however they persisted with their question, He raised His head and said to them, "Let the sinless man among you be the first to throw a stone at her."

Matthew 7:3-5

And why do you look at the splinter in your brother's eye, and not notice the beam which is in your own eye?

John 8:40-44

But, in fact, you are longing to kill me, a man who has spoken to you the truth which I have heard from God. Abraham did not do that.

Romans 2:1

You are therefore without excuse, O man, whoever you are who sit in judgement upon others. For when you pass judgement on your fellow man, you condemn yourself; for you who sit in judgement upon others are guilty of the same misdeeds;

Romans 2:21-24

you then who teach your fellow man, do you refuse to teach yourself? You who cry out against stealing, are you yourself a thief?

James 1:24

Although he has looked carefully at himself, he goes away, and has immediately forgotten the sort of man 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 in your brother's eye, and not notice the beam which is in your own eye?
Romans 2:1
You are therefore without excuse, O man, whoever you are who sit in judgement upon others. For when you pass judgement on your fellow man, you condemn yourself; for you who sit in judgement upon others are guilty of the same misdeeds;

But

John 8:7
When however they persisted with their question, He raised His head and said to them, "Let the sinless man among you be the first to throw a stone at her."
James 1:24
Although he has looked carefully at himself, he goes away, and has immediately forgotten the sort of man he is.