Chronicles II 34:12

12 And the men faithfully in the works: and over them were superintendents, Jeth and Abdias, Levites of the sons of Merari, and Zacharias and Mosollam, of the sons of Caath, to oversee; and every Levite, and every one that understood to play on musical instruments.

Chronicles II 34:12 Meaning and Commentary

2 Chronicles 34:12

And the men did that work faithfully
The labouring men, as also their inspectors, see ( 2 Kings 22:7 )

and the overseers of them were Jahath and Obadiah, the Levites, of the
sons of Merari;
the third son of Levi:

and Zechariah and Meshullam, of the sons of the Kohathites;
who had their name from Kohath, the second son of Levi:

to set it forward;
to urge and animate the men to their work, to keep them constant to it, and see that they did it well:

and other of the Levites, all that could skill of instruments of music;
these, when they were not employed in singing in the temple, attended this service, to look after the workmen at the repairs of it; and perhaps they might play, as some think, on their instruments of music, while the men were at work, that they might go on in it the more pleasantly and cheerfully.

Chronicles II 34:12 In-Context

10 And they gave it into the hand of the workmen, who were appointed in the house of the Lord, and they gave it to the workmen who wrought in the house of the Lord, to repair and strengthen the house.
11 They gave also to the carpenters and builders, to buy squared stones, and timber for beams to cover the houses which the kings of Juda had destroyed.
12 And the men faithfully in the works: and over them were superintendents, Jeth and Abdias, Levites of the sons of Merari, and Zacharias and Mosollam, of the sons of Caath, to oversee; and every Levite, and every one that understood to play on musical instruments.
13 And over the burden-bearers, and over all the workmen in the respective works; and of the Levites scribes, and judges, and porters.
14 And when they brought forth the money that had been brought into the house of the Lord, Chelcias the priest found a book of the law of the Lord by the hand of Moses.

The Brenton translation of the Septuagint is in the public domain.