But for Jehovah who was on our side. It is not without cause that he twice repeats the same sentence. So long as we are in danger our fear is immoderate; but no sooner are we delivered than we lessen the greatness of our calamity, and Satan, deceiving us by this artifice, leads us to obscure the grace of God. Since then, after having been wonderfully preserved by the Lord, we for the most part devise all sorts of imaginary circumstances, in order to efface from our minds the remembrance of his grace, David, by introducing the people as struck with amazement, purposely dwells upon the amplification of the danger. In these words a bridle is put upon us, to keep us meditating upon our dangers, lest the sense of God's grace should vanish from our minds. The common translation, Had not the Lord been on our side, does not sufficiently express David's meaning; for he affirms that the deliverance and the salvation of the people proceeded from nothing else than God's succor, and at the same time shows that this succor was both certain and evident. Two things then are here to be distinctly noticed; first, that the Lord had been at hand to afford aid to his servants, and had taken their part; and secondly, that being already in a desperate condition, they could not by help from any other quarter, or in another manner, have escaped from danger. Thus we are taught, that men then only ascribe the glory of their preservation to God, when they are persuaded of his being so favourably inclined towards them as to defend them and maintain them safe. In the second clause there is extolled in high terms the infinite power of God, of which he had given abundant proof in delivering the people, to teach us that such a manner of preserving does not belong to man. By the noun 'dm, adam, which when it is collective signifies men in general, David seems to denote a vast number of enemies. The people of God, as if he had said, had not to contend merely against a few men, or against one nation, but were assailed by almost the whole world; it being abundantly manifest that all mankind were the enemies of the Jews. When he says, (Psalm 124:3,) They had swallowed us up alive, [1] he not only expresses barbarous cruelty, but also disproportion of strength. He describes then in the first place how violent was the onset of the enemy, and secondly, how feeble and inadequate the Jews were to withstand them, since these cruel beasts had no need of swords for slaughter, but without a battle or an effort of strength, could easily devour that unwarlike and defenceless flock.

Footnotes

1 - "The metaphor may be taken from famished wild beasts attacking and devouring men, (Comp. 5:5,) or the reference may be to the case of a man shut up alive in a sepulcher, (Proverbs 1:12,) and left there to perish, or (Numbers 16:30) swallowed up by an earthquake " -- Cresswell. "A figurative expression to intimate the savageness of the adversaries, alluding to the practice of many predatory animals of swallowing their victims alive. Such is the well-known habit of many of the predatory kinds of fish." -- Phillips.

If it had not been the Lord who was on our side - Repeating the idea, since the mind was full of it, and carrying the thought forward. This is one of the instances of an ascent of thought in these psalms, from which it has been supposed that the title "Songs of Degrees" was given to this collection. See, however, Introduction to Psalm 120:1-7.
When men rose up against us - When we were assailed by our enemies. On what occasion this occurred, it is now impossible to determine.

If it had not been the Lord who was on our side,.... This he repeats both for the confirmation of it, and to excite the attention of the Israelites to it; as well as to observe that it was not once only, but again and again, many times the Lord appeared to be on their side. The Targum renders it,
"the Word of the Lord;''
the essential Word, the Son of God; and so in Psalm 123:1, in the king's Bible;
when men rose up against us; wicked men; though no hard epithet is given in the text, however just. The enemies of God's people are only called "men" by them, to show their meekness and patience; it is in the singular number, "when man rose up"; hence Aroma interprets it of Pharaoh king of Egypt; and R. Obadiah of Haman: but it might be better interpreted of the man of sin, the man of the earth; who, at the head of his antichristian party, has rose up against the saints, oppressed them, and threatened them with utter ruin, 2-Thessalonians 2:4. Though it is best to understand it of a body of men; of men not mean, but mighty; not few, but numerous; and who united as one man against the people of God, and rose up against them in an hostile manner; being full of enmity to them, and bent upon their ruin.

rose . . . against, &c.-- (Psalm 3:1; Psalm 56:11).