John 21:15-17

15 So when they had dined, Jesus said to Simon Peter, Simon, son of Jonas, lovest thou me more than these? He said unto him, Yes, Lord, thou knowest that I love thee. He said unto him, Feed my lambs.

16 He said to him again the second time, Simon, son of Jonas, lovest thou me? He said unto him, Yes, Lord thou knowest that I love thee. He said unto him, Feed my sheep.

17 He said unto him the third time, Simon, son of Jonas, lovest thou me? Peter was grieved because he said unto him the third time, Lovest thou me? And he said, Lord, thou knowest all things; thou knowest that I love thee. Jesus said unto him, Feed my sheep.