“Which commandment is the most important of all?”: The Torah (Genesis, Exodus, Leviticus, Numbers, and Deuteronomy) contains 613 separate commandments, and Jewish teachers frequently debated about which were more important than others. No command was considered unimportant, but some were recognized as more fundamental than others (see Matthew 22:40).
Rabbi Hillel’s answer to this question was, “What is hateful to you, do not do to your neighbor” (Babylonian Shabbat 31a; see also Tobit 4:15). Other suggestions included Proverbs 3:6; Isaiah 33:15–16; 56:1; Amos 5:4; Micah 6:8; and Habakkuk 2:4.