“he came to the heads of the people,” does not refer to the fact that the Gadites came to Moses and the heads of the congregation, to ask for the conquered land as a possession (Num 32:2), but expressed the thought that Gad joined the heads of the people to go at the head of the tribes of Israel (comp. Jos 1:14; Jos 4:12, with Num 32:17, Num 32:21, Num 32:32), to conquer Canaan with the whole nation, and root out the Canaanites. The Gadites had promised this to Moses and the heads of the people; and this promise Moses regarded as an accomplished act, and praised in these words with prophetic foresight as having been already performed, and that not merely as one single manifestation of their obedience towards the word of the Lord, but rather as a pledge that Gad would always manifest the same disposition. “To do the righteousness of Jehovah,” i.e., to do what Jehovah requires of His people as righteousness - namely, to fulfil the commandments of God, in which the righteousness of Israel was to consist (Deu 6:25). יתא, imperfect Kal for יאהת or יאתּה; see Ges. §76, 2, c., and Ewald, §142, c. “With Israel:” in fellowship with (the rest of) Israel.
Verse 22
Dan is “a young lion which springs out of Bashan.” Whilst Jacob compared him to a serpent by the way, which suddenly bites a horse's feet, so that its rider falls backward, Moses gives greater prominence to the strength which Dan would display in conflict with foes, by calling him a young lion which suddenly springs out of its ambush. The reference to Bashan has nothing to do with the expedition of the Danites against Laish, in the valley of Rehoboth (Jdg 18:28), as this valley did not belong to Bashan. It is to be explained from the simple fact, that in the regions of eastern Bashan, which abound with caves, and more especially in the woody western slopes of Jebel Hauran, many lions harboured, which rushed forth from the thicket, and were very dangerous enemies to the herds of Bashan. Even if no other express testimonies to this fact are to be found it may be inferred from the description given of the eastern spurs of Antilibanus in the Song of Sol. (Sol 4:8), as the abodes of lions and leopards. The meaning leap forth, spring out, is confirmed by both the context and dialects, though the word only occurs here.
Verse 23
Naphtali. - “O Naphtali, satisfied with favour, and full of the blessing of Jehovah; of sea and south shall he take possession.” If the gracefulness of Naphtali is set forth in the blessing of Jacob, by comparing it to a gazelle, here Moses assures the same tribe of satisfaction with the favour and blessing of God, and promises
