I have known, O Lord, that Your judgments are righteous, and that You afflicted me with faithfulness. So said David: all the judgments and afflictions that You brought upon me, and the sufferings that You inflicted upon me, You did so with righteousness. I did not cry out in protest at that time, but I knew, O Lord, that Your judgments are righteous. Similarly, it is said of David in 2 Samuel 15:30: "And David went up by the ascent of the Mount of Olives, weeping as he went up."
It is possible that he cried out in protest or lament, but he only said a psalm, as it is said in Psalm 3: "A psalm of David, when he fled from Absalom his son." Therefore it is said, "I have known, O Lord, that Your judgments are righteous." David said to God, "You afflicted me, now comfort me. Just as You afflicted me, may Your mercy comfort me, as You have promised Your servant."
What statement is this that Ethan the Ezrahite made, "And I am crushed before Him because of His foes?" Therefore it is said, "As You have said to Your servant, so may Your mercy come to me, that I may live." David brought upon himself the mercy that was present when You created the world, with mercy. As it is said, "Remember Your mercy, O Lord." Therefore it is said, "May Your mercy come upon me, and I will live."