Charles H. Spurgeon on Psalms 69:13

But as for me, my prayer is unto thee, O Lord. He turned to Jehovah in prayer as being the most natural thing for the godly to do in their distress. To whom should a child turn but to his father. He did not answer them; like a sheep before her shearers he was dumb to them, but he opened his mouth unto the Lord his God, for he would hear and deliver. In an acceptable time. It was a time of rejection with man, but of acceptance with God. Sin ruled on earth, but grace reigned in heaven. There is to each of us an accepted time, and woe to us if we suffer it to glide away unimproved. God's time must be our time, or it will come to pass that, when time closes, we shall look in vain for space for repentance. Our Lord's prayers were well timed, and always met with acceptance.

O God, in the multitude of thy mercy hear me. Even the perfect one makes his appeal to the rich mercy of God, much more should we. To misery no attribute is more sweet than mercy, and when sorrows multiply, the multitude of mercy is much prized. When enemies are more than the hairs of our head, they are yet to be numbered, but God's mercies are altogether innumerable, and let it never be forgotten that every one of them is an available and powerful argument in the hand of faith. In the truth of thy salvation. "Jehovah's faithfulness is a further mighty plea." His salvation is no fiction, no mockery, no changeable thing, therefore he is asked to manifest it, and make all men see his fidelity to his promise. Our Lord teaches us here the sacred art of wrestling in prayer, and ordering our cause with arguments; and he also indicates to us that the nature of God is the great treasury of strong reasons, which shall be to us most prevalent in supplication.