וַיַּגֵּ֨ד לָכֶ֜ם אֶת־בְּרִית֗וֹ אֲשֶׁ֨ר צִוָּ֤ה אֶתְכֶם֙ לַעֲשׂ֔וֹת עֲשֶׂ֖רֶת הַדְּבָרִ֑ים וַֽיִּכְתְּבֵ֔ם עַל־שְׁנֵ֖י לֻח֥וֹת אֲבָנִֽים׃
여호와께서 그 언약을 너희에게 반포하시고 너희로 지키라 명하셨으니 곧 십계명이며 두 돌판에 친히 쓰신 것이라
Mishneh Torah, Foundations of the Torah
It is mandatory to love and fear this Glorified and Awe-inspiring God, for it is said: "Thou shalt love the Lord thy God" (Deut. 6,5); and as it is said: "The Lord thy God thou shalt fear." (Ibid. 6, 13).