John 13:12

So after he had washed their feet, and had put on his upper garments again, and taken his place, he said to them.

Jesus answered him, "What I am doing you do not understand now, but you will understand it later."

"Have you understood all this?" he asked. "We have," they answered him.

"You do not understand this parable," said Jesus. "Then how will you understand the other parables?

and was now going to God, rose from supper, laid aside his upper garments, and took a towel and girded himself.

Treasury of Scripture Knowledge

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?

Jesus answered him, "What I am doing you do not understand now, but you will understand it later."

"Have you understood all this?" he asked. "We have," they answered him.

"You do not understand this parable," said Jesus. "Then how will you understand the other parables?