1 Chronicles 7:2

Chiefs. They were at the head of distinct families. (Menochius) --- David. We know that David took an account of his fighting men, 2 Kings xxiv. But it is not certain that this register was made at that time; as we read that Benjamin was not numbered, chap. xxi. 6. These lists were probably made when some expedition was intended by David. The author was not, perhaps, able to recover the accounts of Nephthali, Manasses, and Ephraim, no more that the genealogies of Dan (ver. 12) and Zabulon, which do not appear in this book. (Calmet)