Luke 6:41

And why do you look for the speck of sawdust in your brother's eye but ignore the board in your own eye?

John 8:7

But when they continued asking Him [about the woman], He stood up and said to them, "That person among you who has never sinned should be the first one to throw a stone at her."

Matthew 7:3-5

And why do you look for the speck of sawdust in your brother's eye but ignore the board in your own eye?

John 8:40-44

But instead, you are trying to kill me, a man who has [only] told you the truth, which I heard from God. Abraham did not do this [kind of thing].

Romans 2:1

So, whoever you are, you people do not have any excuse for judging people [Note: At this point Paul begins addressing the Jews. See verse 17]. For in a matter where you judge someone else [to be wrong] you [actually] condemn yourselves, because you are practicing the same things [you condemn them for doing].

Romans 2:21-24

since you teach other people [all of this], why do you not teach yourselves [these things]? You preach that a person should not steal, [but] do you steal?

James 1:24

and [then after] he sees himself, [he] goes away and immediately forgets what he looks 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 for the speck of sawdust in your brother's eye but ignore the board in your own eye?
Romans 2:1
So, whoever you are, you people do not have any excuse for judging people [Note: At this point Paul begins addressing the Jews. See verse 17]. For in a matter where you judge someone else [to be wrong] you [actually] condemn yourselves, because you are practicing the same things [you condemn them for doing].

But

John 8:7
But when they continued asking Him [about the woman], He stood up and said to them, "That person among you who has never sinned should be the first one to throw a stone at her."
James 1:24
and [then after] he sees himself, [he] goes away and immediately forgets what he looks like.