Bible Verses About Prophets: One generally attached to the king's household

And David arose in the morning, and the word of the Lord came to Gad the prophet and the seer of David, saying:

And he set the Levites in the house of the Lord with cymbals, and psalteries, and harps according to the regulation of David the king, and of Gad the seer, and of Nathan the prophet: for it was the commandment of the Lord by the hand of his prophets.

And the singers the sons of Asaph stood in their order, according to the commandment of David, and Asaph, and Heman, and Idithun, the prophets of the king: and the porters kept guard at every gate, so as not to depart one moment from their service, and therefore their brethren the Levites prepared meats for them.