2 Chronicles 29:25
And he set the Levites in the house of the LORD with cymbals, with psalteries, and with harps, according to the commandment of David, and of Gad the king’s seer, and Nathan the prophet: for so was the commandment of the LORD by his prophets.
The verse belongs to Hezekiah's reopening of the temple and restoring the work of the temple and the worship of Jehovah after the temple had been forsaken and the people had worshiped idols. It is part of his turning Judah from idolatry back to faithful worship, reviving the ancient worship and bringing the priests and Levites back to service in the temple, including the cleansing of the temple and the offering of sacrifices for Israel. Hezekiah made this his first work immediately upon beginning to reign at twenty-five years old, after a season of great decline in temporal affairs and morals. As the son of a bad father, he acted under the bad influence left upon the people by his father Ahaz and his grandfather Jotham, while he himself had received a pious mould through the influence of his mother.
The work took ability and determination because evil beliefs and practices were strong upon the people, though they were dissatisfied with conditions under his father and grandfather. The temple was cleared of the accumulated rubbish of years and its ordered worship was restored. Then messengers were sent with letters from city to city throughout the northern kingdom inviting the people everywhere to forsake idols and return to the true God and come to a great religious festival at Jerusalem, with some coming and others mocking. The resulting great Passover feast lasting fourteen days with many sacrifices offered with great gladness was the greatest revival Israel had known since Solomon, after which the people under the king's direction went through the city breaking down idols, cutting down groves, and destroying high places and altars.
The verse shows Hezekiah set the Levites in their places for service in the house of the Lord, and that this disposition was done according to a former commandment for their order in worship. Their use of cymbals, psalteries, and harps in the house of the Lord was an arrangement commanded by the Lord through the prophets and established by divine instruction. By naming Gad the king's seer and Nathan the prophet, the verse shows that seer and prophet are the same office, adding two more to the more than one hundred and fifty prophets named in the Old Testament besides the sixteen from Isaiah to Malachi.
Hezekiah's action shows that those who honor God will be honored by God. His actions were done for God's glory, and God could bless him as he served faithfully. Hezekiah took the initiative in national religious reform, illustrating that king and prophet worked together in revival in ancient Israel.