1 Chronicles 11:2

And moreover, in time past, even when Saul was king, thou wast he that leddest out and broughtest in Israel; for David, before Saul sought his life, had been one of the chief officers of his army; and the Lord, thy God, said unto thee, namely, by Samuel, the prophet, a fact which had become generally known, 1 Samuel 16:1; 2 Samuel 3:9, Thou shalt feed My people Israel, said of the fostering care which a king should show his people, and thou shalt be ruler over My people Israel.