What law is in view?
The word “law” (Heb. torah) comprises the whole of God’s teaching to his people. We should therefore not think of ethical prescriptions in the first place when we read this word. A better summary would be to say it comprises what God meant by his desire to be a God to Abraham’s descendants and have them as a people for himself. This totality is what Israel knew as the “Law”; it includes history, stories, prescriptions, promises, rituals, etc.
2 but his delight is in the law of the LORD, and on his law he meditates day and night.