'Feed My Sheep' in the Bible

As I live, says the Lord Yahweh, surely because my sheep became a prey, and my sheep became food to all the animals of the field, because there was no shepherd, neither did my shepherds search for my sheep, but the shepherds fed themselves, and didn't feed my sheep;

He said to him the third time, "Simon, son of Jonah, do you have affection for me?" Peter was grieved because he asked him the third time, "Do you have affection for me?" He said to him, "Lord, you know everything. You know that I have affection for you." Jesus said to him, "Feed my sheep.