For He knew who would betray Him; therefore He said, "You are not all clean."
So when He had washed their feet, taken His garments, and sat down again, He said to them, "Do you know what I have done to you?
You call me Teacher and Lord, and you say well, for so I am.
If I then, your Lord and Teacher, have washed your feet, you also ought to wash one another's feet.
For I have given you an example, that you should do as I have done to you.
Most assuredly, I say to you, a servant is not greater than his master; nor is he who is sent greater than he who sent him.
If you know these things, blessed are you if you do them.
I do not speak concerning all of you. I know whom I have chosen; but that the Scripture may be fulfilled, 'He who eats bread with Me has lifted up his heel against Me.'
References for John 13:18
Now I tell you before it comes, that when it does come to pass, you may believe that I am He.
Most assuredly, I say to you, he who receives whomever I send receives Me; and he who receives Me receives Him who sent Me."
When Jesus had said these things, He was troubled in spirit, and testified and said, "Most assuredly, I say to you, one of you will betray Me."