Jeremiah 7:23

but this thing commanded I them, saying, Obey My voice, and I will be your God, and ye shall be My people, that being the fundamental principle upon which the entire relation between God and Israel was built up, and walk ye in all the ways that I have commanded you that it may be well unto you. All the Jewish rites and ceremonies presupposed faith and obedience on the part of the people. God required no sacrifice, unless it was the outgrowth of obedience grounded in faith. The actual claims of the Moral Law always preceded the ordinances pertaining to the outward form of worship. Cf 1 Samuel 15:22.