"I am the LORD thy God" (KJV, also "I am Yahweh your God" NJB, WEB, Hebrew: אָֽנֹכִ֖י֙ יְהוָ֣ה אֱלֹהֶ֑֔יךָ, romanized: ’Ānōḵî YHWH ’ĕlōheḵā, Ancient Greek: ἐγώ εἰμι ὁ Κύριος ὁ Θεός σου, romanized: egṓ eimi ho Kúrios ho Theós sou) is the opening phrase of the Ten Commandments, which are widely understood as moral imperatives by ancient legal historians and Jewish and Christian biblical scholars.
Chapter 20 of the Book of Exodus begins:
Idolatry in Judaism (Hebrew: עבודה זרה) is prohibited. Judaism holds that idolatry is not limited to the worship of an idol itself, but also worship involving any artistic representations of God. The prohibition is epitomized by the first two "words" of the decalogue: I am the Lord thy God, Thou shalt have no other gods before me, and Thou shalt not make unto thee any graven image or any image in the sky, on earth or in the sea. These prohibitions are re-emphasized repeatedly by the later prophets, suggesting the ongoing appeal of Canaanite religion and syncretic assimilation to the ancient Israelites.
In addition, it is forbidden to derive benefit (hana'ah) from anything dedicated to idolatry.