John Gill Bible Commentary

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 Psa 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, Th2 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.