Now then bring it about, for the LORD has promised David, saying, ‘By the hand of my servant David I will save my people Israel from the hand of the Philistines, and from the hand of all their enemies.’”
Here, I. Abner breaks with Ish-bosheth, and deserts his interest, upon a little provocation which Ish-bosheth unadvisedly gave him. God can serve his own purposes by the sins and follies of men. 1. Ish-bosheth accused Abner of no less a crime than debauching one of his father's concubines, Sa2 3:7.
Commenting on 2 Samuel 3:7-21
Now then do it,.... Make him your king, and I shall no longer oppose it as I have done: for the Lord hath spoken of David; concerning his being king, and the saviour of his people Israel: saying, by the hand of my servant David I will save my people Israel out of the hand of the Philistines, and out of the hand of all...
The Lord hath spoken of David - Where is this spoken? Such a promise is not extant. Perhaps it means no more than, "Thus, it may be presumed, God hath determined."