Thou hast made us to turn back from the enemy. Here the people of God still further complain, that he had made them to flee before their enemies, and had given them up as a prey to be devoured by them. As the saints firmly believe that men are strong and valiant only in so far as God upholds them by his secret power, they also conclude, that when men flee, and are seized with trembling, it is God who strikes them with terror, so that the poor wretched creatures are deprived of reason, and both their skill and courage fail them. The expression here used is taken from the Law, Deuteronomy 32:30, where Moses says, "How should one chase a thousand, and two put ten thousand to flight, except their Rock had sold them, and the Lord had shut them up?" The faithful, fully persuaded of this truth, do not ascribe to fortune the change which had passed over them, that those who were wont vigorously and fearlessly to assail their enemies, were now terrified by their very appearance; but they feel assured that it was by the appointment of heaven that they were thus discomfited, and made to flee before their enemies. And as they formerly confessed that the strength which they had hitherto possessed was the gift of God, so, on the other hand, they also acknowledge that the fear by which they are now actuated was inflicted upon them as a punishment by God. And when God thus deprived them of courage, they say that they are exposed to the will of their enemies; for in this sense I interpret the word lmv, lamo, which I have rendered, for themselves, namely, that their enemies destroyed them at their pleasure and without any resistance, as their prey. To the same purpose is that other comparison, (verse 11) in which they say that they were given as sheep for food [1] By this the prophet intimates, that being already vanquished previous to the battle, they fell down, as it were, upon the earth before their enemies, ready to be devoured by them, and not fit for any thing else than to gratify their insatiable cruelty. It ought to be observed, that when the faithful represent God as the author of their calamities, it is not in the way of murmuring against him, but that they may with greater confidence seek relief, as it were, from the same hand which smote and wounded them. It is certainly impossible that those who impute their miseries to fortune can sincerely have recourse to God, or look for help and salvation from him. If, therefore, we would expect a remedy from God for our miseries, we must believe that they befall us not by fortune or mere chance, but that they are inflicted upon us properly by his hand. Having stated that they were thus abandoned to the will of their enemies, they add, at the same time, that they were scattered among the heathen: a dispersion which was a hundred times more grievous to them than death. The whole glory and felicity of that people consisted in this, that, being united under one God and one King, they formed one body; and that such being the case, it was a sign that the curse of God lay heavy upon them to be mingled among the heathen, and scattered hither and thither like broken members.

Footnotes

1 - "This very strongly and strikingly intimates the extent of the persecution and slaughter to which they were exposed; there being no creature in the world of which such vast numbers are constantly slaughtered as of sheep, for the subsistence of man. The constancy of such slaughter is also mentioned in verse 22, as illustrating the continual oppression to which the Hebrews were subject." -- Illustrated Commentary upon the Bible.

Thou makest us to turn back from the enemy - Instead of giving us the victory. That is, we are defeated.
And they which hate us spoil for themselves - They plunder us; they take our property as spoil, and carry it away. That this was done at the time referred to in the introduction as the time of the composition of the psalm, is apparent from the narrative in the Book of Chronicles. 2-Chronicles 36:7, "Nebuchadnezzar also carried of the vessels of the house of the Lord to Babylon, and put them in his temple at Babylon." Compare 2-Kings 23:33; 2-Kings 24:13-16; 2-Kings 25:13-17.

Thou makest us to turn back - This thou didst: and our enemies, profiting by the occasion, finding our strength was departed from us, made us an easy prey, captivated our persons, and spoiled us of our property.

Thou makest us to turn back from the enemy,.... In the times of Eli, according to Arama; but may he understood of some of the visible members of the church, and professors of religion, not being valiant for the truth, and deserting the cause of God and Christ, by reason of tribulation and persecution arising because of the word;
and they which hate us spoil for themselves; by seizing on the goods and substance of those they persecuted; enriching themselves by confiscating their estates and possessions to their own use; or by spoiling others of them, they deceived with their corrupt doctrines and soul destroying principles, whereby they became slaves to the antichristian party; this may respect the same wars as before.