Salmos 69:23

23. Let their eyes be darkened The Hebrew verb is simply in Kal, future, as in the preceding verse, and should be rendered, Their eyes shall be darkened; the darkness being that of the mind, and the fruit of perversity. Men become blinded by evil desire, passion, and prejudice, and in this state rush madly on to ruin, God, meanwhile, withdrawing his Spirit in judgment. See Romans 1:21-26; 2 Thessalonians 2:9-12.

Their loins… shake That is, through fear and apprehension, as not knowing whom to trust. See Psalms 69:22. “Loins” are here mentioned as the foundation of a man’s strength. Paul quotes it: “Bow down their back alway,” which would be only the effect of weakness and trembling of the “loins” and limbs. Romans 11:10