Psalms 130:3 - Ellicott's Commentary On The Whole Bible

If thou. — The word rendered “mark” is “watch” in Psalms 130:6. If “Jah” were to watch for men’s lapses, as one watches for the dawn, nothing but signal punishment could follow. So Job (Job 10:14; Job 14:16) actually believed God did watch; while the prophets Jeremiah (Jeremiah 3:5) and Amos (Amos 1:11) use the word of the strict care taken that the consequences should follow the sin. It is a fact worthy of attention, that misfortune provokes at this crisis, in this people so profoundly religious, not murmurings against the Divine dealings, but a sense of deep contrition.