New Revised Standard Version
After he had washed their feet, had put on his robe, and had returned to the table, he said to them, “Do you know what I have done to you?

Contemporary English Version
After Jesus had washed his disciples' feet and had put his outer garment back on, he sat down again. Then he said: Do you understand what I have done?

New American Bible
So when he had washed their feet [and] put his garments back on and reclined at table again, he said to them, “Do you realize what I have done for you?

Douay-Rheims Bible
Then after he had washed their feet and taken his garments, being set down again, he said to them: Know you what I have done to you?

Then after he had washed their feet and taken his garments, being set down again, he said to them: Know you what I have done to you?

Know.

John 13:7 Jesus answered and said to him: What I do, thou knowest not now; but thou shalt know hereafter.

Ezekiel 24:19,24 And the people said to me: Why dost thou not tell us what these things mean that thou doest? . . .

Matthew 13:51 Have ye understood all these things? They say to him: Yes.

Mark 4:13 And he saith to them: Are you ignorant of this, parable? and how shall you know all parables?