John 13:2-12

2 So while a meal was going on, the Evil One having now put it into the heart of Judas Iscariot, Simon's son, to be false to him,
3 Jesus, being conscious that the Father had put everything into his hands, and that he came from God and was going to God,
4 Got up from table, put off his robe and took a cloth and put it round him.
5 Then he put water into a basin and was washing the feet of the disciples and drying them with the cloth which was round him.
6 So he came to Simon Peter. Peter said, Lord, are my feet to be washed by you?
7 And Jesus, answering, said to him, What I do is not clear to you now, but it will be clear to you in time to come.
8 Peter said, I will never let my feet be washed by you, never. Jesus said in answer, If I do not make you clean you have no part with me.
9 Simon Peter said to him, Lord, not my feet only, but my hands and my head.
10 Jesus said to him, He who is bathed has need only to have his feet washed and then he is clean all over: and you, my disciples, are clean, but not all of you.
11 (He had knowledge who was false to him; that is why he said, You are not all clean.)
12 Then, after washing their feet and putting on his robe again, he took his seat and said to them, Do you see what I have done to you?
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