Before the Passover celebration, Jesus knew that his hour had come to leave this world and return to his Father. He now showed the disciples the full extent of his love.
It was time for supper, and the Devil had already enticed Judas, son of Simon Iscariot, to carry out his plan to betray Jesus.
Jesus knew that the Father had given him authority over everything and that he had come from God and would return to God.
So he got up from the table, took off his robe, wrapped a towel around his waist,
and poured water into a basin. Then he began to wash the disciples' feet and to wipe them with the towel he had around him.
When he came to Simon Peter, Peter said to him, "Lord, why are you going to wash my feet?"
Jesus replied, "You don't understand now why I am doing it; someday you will."
"No," Peter protested, "you will never wash my feet!" Jesus replied, "But if I don't wash you, you won't belong to me."
Simon Peter exclaimed, "Then wash my hands and head as well, Lord, not just my feet!"
Jesus replied, "A person who has bathed all over does not need to wash, except for the feet, to be entirely clean. And you are clean, but that isn't true of everyone here."
References for John 13:10
For Jesus knew who would betray him. That is what he meant when he said, "Not all of you are clean."
After washing their feet, he put on his robe again and sat down and asked, "Do you understand what I was doing?
You call me 'Teacher' and 'Lord,' and you are right, because it is true.
And since I, the Lord and Teacher, have washed your feet, you ought to wash each other's feet.
I have given you an example to follow. Do as I have done to you.
How true it is that a servant is not greater than the master. Nor are messengers more important than the one who sends them.
You know these things -- now do them! That is the path of blessing."