Wherefore should the Heathen say, where is their God?.... They boast of, and put their confidence in, and expect salvation from? he does not appear for them, he is not with them; he has forsaken them, and will not help them; than which nothing can be more afflicting and distressing to the Lord's people; see Psa 42:3, let him be known among the Heathen in our sight; in his holiness and justice, as a God of power, and to whom vengeance belongs; let him be known by his judgments executed upon the Heathen, openly and publicly in our sight, and in the view of the whole world; see Psa 9:16, so it follows, by the revenging of the blood of thy servants, which is shed; as in Psa 79:3, which blood God will revenge according to the request of his people, and give them blood to drink by way of retaliation; by which means his vindictive justice will be known, and it will be seen where the God of his people is, that he is with them, and maintains their cause; see Rev 6:9. The words may be rendered in connection with the preceding clause thus; "let it be known among the Heathen in our sight, even the revenging of the blood of thy servants which is shed"; though Kimchi supplies the words as we do, "by a revenging", &c.