Psa 143:1 O LORD, hear my prayer, listen to my cry for mercy; in your faithfulness and righteousness come to my relief. The question is can we separate the law of God with the covenant promises? The law in the OT was always a covenant -law. Why was the law and the covenant connected? Because God was putting Himself on notice that He alone would fulfill the requirements of the law in order to show Himself faithful in His covenant promises. Christ was covenant keeper.