Verses 15 to 17 of John 21.

After breakfast Jesus asked Simon Peter, “Simon son of John, do you love me more than these?”

“Yes, Lord,” Peter replied, “you know I love you.”

“Then feed my lambs,” Jesus told him.

Jesus repeated the question: “Simon son of John, do you love me?”

“Yes, Lord,” Peter said, “you know I love you.”

“Then take care of my sheep,” Jesus said.

A third time he asked him, “Simon son of John, do you love me?”

Peter was hurt that Jesus asked the question a third time. He said, “Lord, you know everything. You know that I love you.”

Jesus said, “Then feed my sheep.