'Feed My Sheep' in the Bible

Jesus says to him again the second time, Simon of Jonas, lovest thou me? He says to him, Yes, Lord; thou knowest that I love thee. He says to him, Feed my sheep.

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