31 These are they whom David set over the service of song in the house of Yahweh, after that the ark had rest.
*Minor differences ignored. Grouped by changes, with first version listed as example.
The genealogies of David's three chief singers, Heman, Asaph, and Ethan or Jeduthun.
After that the ark had rest - The Targum says, "These are they whom David set over the service of the singing, in the house of the sanctuary, or tabernacle of the Lord, at the time in which the ark was brought into it;" that is, when it was brought from the house of Obed-edom.
And these [are they] whom David set over the service of song in the house of the LORD, after that the ark had (f) rest.
(f) After it was brought to the place where the temple would be built and was no longer carried to and fro.
And these are they,.... Who follow; the account of whom begins 1-Chronicles 6:33,
whom David set over the service of the song in the house of the Lord: whom he appointed chief musicians, and masters of the chorus, to manage and conduct that part of divine service in the sanctuary, singing the praises of God, both with vocal and instrumental music:
after the ark had rest; which was when it was brought from the house of Obededom to the city of David, and was placed in a tabernacle he provided for it, 2-Samuel 6:12, where it remained until the temple was built, when and which was the only time it was removed, whereas before it had been removed from place to place, and so till now had no rest; though some understand this of the ceasing or silence of the oracle over the ark, which was neither consulted by Solomon and his successors, nor any of the high priests afterwards (g).
(g) Vid. Marsham. Canon. Chron. Setul. 14. p. 365.
(6:16-34). The genealogies of the Levite musicians - Heman, Asaph, and Ethan. - These registers are introduced by an account of the service of the Levites about the sanctuary (1-Chronicles 6:31, 1-Chronicles 6:32), and conclude with remarks on the service of the remaining Levites (1-Chronicles 6:48, 1-Chronicles 6:49).
*More commentary available at chapter level.