Genesis 32:26

And he said, let me go, for the day breaketh,.... This was said that he might seem to be a man that was desirous of going about his business, as men do early in the morning; though the true reason perhaps was, that his form might not be more distinctly seen by Jacob, and much less by any other person:

and he said, I will not let thee go except thou bless me; for by his touching his thigh, and the effect of that, he perceived he was more than a man, even a divine Person, and therefore insisted upon being blessed by him: thus faith in prayer lays hold on God, and will not let him go without leaving the blessing it is pleading for; which shows the great strength of faith, and the efficacy of the prayer of faith with God; see Exodus 32:10.