Prophets: One Generally Attached to the King's Household

When David got up in the morning, the word of the LORD had come to Gad the prophet, David’s seer:

Hezekiah stationed the Levites in the house of the LORD with cymbals, harps, and lyres according to the command of David, of Gad the king’s seer, and of Nathan the prophet. For the command had come from the LORD through His prophets.

The singers, the descendants of Asaph, were at their stations according to the command of David, Asaph, Heman, and Jeduthun the king’s seer. And the gatekeepers at each gate did not need to leave their posts, because their fellow Levites made preparations for them.