Our fathers trusted in thee. Here the Psalmist assigns the reason why God sitteth amidst the praises of the tribes of Israel. The reason is, because his hand had been always stretched forth to preserve his faithful people. David, as I have just now observed, gathers together the examples of all past ages, in order thereby to encourage, strengthen, and effectually persuade himself, that as God had never cast off any of his chosen people, he also would be one of the number of those for whom deliverance is securely laid up in the hand of God. He therefore expressly declares that he belongs to the offspring of those who had been heard, intimating by this, that he is an heir of the same grace which they had experienced. He has an eye to the covenant by which God had adopted the posterity of Abraham to be his peculiar people. It would be of little consequence to know the varied instances in which God has exercised his mercy towards his own people, unless each of us could reckon himself among their number, as David includes himself in the Church of God. In repeating three times that the fathers had obtained deliverance by trusting, there is no doubt that with all modesty he intends tacitly to intimate that he had the same hope with which they were inspired, a hope which draws after it, as its effect, the fulfillment of the promises in our behalf. In order that a man may derive encouragement from the blessings which God has bestowed upon his servants in former times, he should turn his attention to the free promises of God's word, and to the faith which leans upon them. In short, to show that this confidence was neither cold nor dead, David tells us, at the same time, that they cried unto God. He who pretends that he trusts in God, and yet is so listless and indifferent under his calamities that he does not implore his aid, lies shamefully. By prayer, then, true faith is known, as the goodness of a tree is known by its fruit. It ought also to be observed, that God regards no other prayers as right but those which proceed from faith, and are accompanied with it. It is therefore not without good reason that David has put the word cried in the middle between these words, They trusted in thee, they trusted, in the fourth verse, and these words, They trusted in thee, in the fifth verse.

Our fathers trusted in thee - This is a plea of the sufferer as drawn from the character which God had manifested in former times. The argument is, that he had interposed in those times when his people in trouble had called upon him; and he now pleads with God that he would manifest himself to him in the same way. The argument derives additional force also from the idea that he who now pleads was descended from them, or was of the same nation and people, and that he might call them his ancestors. As applicable to the Redeemer, the argument is that he was descended from those holy and suffering men who had trusted in God, and in whose behalf God had so often interposed. He identifies himself with that people; he regards himself as one of their number; and he makes mention of God's merciful interposition in their behalf, and of the fact that he had not forsaken them in their troubles, as a reason why he should now interpose in his behalf and save him. As applicable to others, it is an argument which the people of God may always use in their trials - that God has thus interposed in behalf of his people of former times who trusted in him, and who called upon him. God is always the same. We may strengthen our faith in our trials by the assurance that he never changes; and, in pleading with him, we may urge it as an argument that he has often interposed when the tried and the afflicted of his people have called upon him.
They trusted, and thou didst deliver them - They confided in thee; they called on thee; thou didst not spurn their prayer; thou didst not forsake them.

Our fathers trusted in thee - David is supposed to have been, at the time of composing this Psalm, at Mahanaim, where Jacob was once in such great distress; where he wrestled with the angel, and was so signally blessed. David might well allude to this circumstance in order to strengthen his faith in God. I am now in the place where God so signally blessed the head and father of our tribes. I wrestle with God, as he did; may I not expect similar success?

Our fathers trusted in thee,.... By whom are meant Abraham, Isaac, and Jacob, from whom our Lord descended; and the people of Israel when in Egypt, in the times of the judges, and in all ages before the coming of Christ, of whom, as concerning the flesh, or as to his human nature, Christ came, Romans 9:5; these, as they were sojourners, and went from place to place, especially the patriarchs, and were often in trouble and distress, when they called upon the Lord, looked to him, and put their trust and confidence in him; not in themselves, their own wisdom, riches, and strength, nor in others, in any mere creature, nor in any outward thing, or arm of flesh, but in the Lord Jehovah, in whom is everlasting strength; they believed in the power of God, that he was able to help and deliver them, and they had faith in him that he would; they depended upon his word and promise, and were persuaded he would never suffer his faithfulness to fail; they committed themselves to the Lord, and stayed themselves upon him;
they trusted; this is repeated not only for the sake of emphasis, pointing out something remarkable and commendable, and for the greater certainty of it, more strongly confirming it; or to observe the many that put their trust in the Lord, the numerous instances of confidence in him; but also to denote the constancy and continuance of their faith, they trusted in the Lord at all times;
and thou didst deliver them; out of the hands of all their enemies, and out of all their sorrows and afflictions; instances of which we have in the patriarchs, and in the people of Israel when brought out of Egypt, and through the Red sea and wilderness, and in the times of the judges, when they were distressed by their neighbours, and God sent them a deliverer time after time.

Past experience of God's people is a ground of trust. The mention of "our fathers" does not destroy the applicability of the words as the language of our Saviour's human nature.