John 13:12

When therefore he had washed their feet, and taken his garments, having sat down again, he said to them, Do ye know what I have done to you?

John 13:7

Jesus answered and said to him, What I do thou dost not know now, but thou shalt know hereafter.

Ezekiel 24:19

And the people said unto me, Wilt thou not tell us what these things are to us, which thou doest?

Ezekiel 24:24

Thus Ezekiel shall be unto you a sign; according to all that he hath done shall ye do: when it cometh, then ye shall know that I am the Lord Jehovah.

Matthew 13:51

Jesus says to them, Have ye understood all these things? They say to him, Yea, Lord.

Mark 4:13

And he says to them, Do ye not know this parable? and how will ye be acquainted with all the parables?

John 13:4

rises from supper and lays aside his garments, and having taken a linen towel he girded himself:

Treasury of Scripture Knowledge

Summary

So after he had washed their feet, and had taken his garments, and was set down again, he said unto them, Know ye what I have done to you?

Bible References

Know

John 13:7
Jesus answered and said to him, What I do thou dost not know now, but thou shalt know hereafter.
Ezekiel 24:19
And the people said unto me, Wilt thou not tell us what these things are to us, which thou doest?
Matthew 13:51
Jesus says to them, Have ye understood all these things? They say to him, Yea, Lord.
Mark 4:13
And he says to them, Do ye not know this parable? and how will ye be acquainted with all the parables?