Matthew Henry on 1 Chronicles 27:16–end
We have here an account,
I. Of the princes of the tribes. Something of the ancient order instituted by Moses in the wilderness was still kept up, that every tribe should have its prince or chief. It is probable that it was kept up all along, either by election or by succession, in the same family; and those are here named who were found in that office when this account was taken. Elihu, or Eliab, who was prince of Judah, was the eldest son of Jesse, and descended in a right line from Nahshon and Salmon, the princes of this tribe in Moses's time. Whether these princes were of the nature of lord-lieutenants that guided them in their military affairs, or chief-justices that presided in their co…
Read the whole note in the consoleJamieson-Fausset-Brown on 1 Chronicles 27:23
But David took not the number of them from twenty years old and under--The census which David ordered did not extend to all the Israelites; for to contemplate such an enumeration would have been to attempt an impossibility (Gen 28:14), and besides would have been a daring offense to God. The limitation to a certain age was what had probably quieted David's conscience as to the lawfulness of the measure, while its expediency was strongly pressed upon his mind by the army arrangements he had in view.
Adam Clarke on 1 Chronicles 27:16
Over the tribes of Israel - In this enumeration there is no mention of the tribes of Asher and Gad. Probably the account of these has been lost from this register. These rulers appear to have been all honorary men, without pay, like the lords lieutenants of our counties.
John Gill on 1 Chronicles 27:23
But David took not the number of them from twenty years old and under,.... Only those that were twenty years and upwards; but, according to Cornelius Bertram (k), he numbered them that were under twenty, though but sixteen, seventeen, eighteen, or nineteen years of age, provided they were of robust bodies, and of a tall stature, and able to bear arms; which he takes to be the sin of David, in numbering the people, being contrary to the law of God; yet though he had ordered them to be numbered, and they were, yet he would not take them and put them into the account of his chronicles, as in the next verse, that his sin might not be known, see 2 Samuel 24:9.
because the Lord had said, he would…