1 Chronicles 12:22

“For at that time, day by day, there came to David to help him, etc.] Particularly after the defeat of Saul by the Philistines, unto the time that David came to Hebron: until it was a great host, like the host of God; the heavenly host, the angels; so the Targum. Ver. 23-37. And these are the numbers of the bands that were ready armed to the war, etc.] That were trained up to it, and accounted for it: and came to David to Hebron; after the death of Ishbosheth and Abner, and when David had reigned seven years in Hebron: to turn the kingdom of Saul to him; to transfer it to him and his family: according to the word of the Lord; by Samuel, which they were acquainted with; and the number of those…”

“the host of God--that is, a great and powerful army.”

“That time - While he was at Ziklag, and in his march to Hebron, and principally at Hebron. Like - Innumerable, like the stars or angels, both which are called God's hosts. 1 Chronicles 12:24”

“day by day: Sa2 2:2-4, Sa2 3:1; Job 17:9 like the host of God: That is, says the Targumist, a very numerous army, like the army of the angel of God. Gen 32:2; Jos 5:14; Psa 148:2 1 Chronicles 12:23”

“"For every day" (בּיום יום לעת, at the time of each day) "came (people) to David to help him, until to a great host, like a host of God," i.e., until his band grew to a camp like to a host of God. אלהים מחנה, a host which God has formed, and in which the power of God shows itself; cf. hills and cedars of God, Psa 36:7; Psa 80:11. In these concluding remarks to the enumeration by name of the valiant men who during Saul's lifetime went over to David, there is no exaggeration which would betray an idealizing historian (Movers, S. 270). The greatness of a host of God is to be estimated according to the power and the spirit, not according to the number, of the warriors, so that we need not take…”