אֶת־יְהוָ֧ה אֱלֹהֶ֛יךָ תִּירָ֖א אֹת֣וֹ תַעֲבֹ֑ד וּב֣וֹ תִדְבָּ֔ק וּבִשְׁמ֖וֹ תִּשָּׁבֵֽעַ׃
A Yehovah teu Deus temerás, a Ele servirás, e a Ele te apegarás, e por Seu Nome jurarás.
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).
Mishneh Torah, Positive Mitzvot
To fear Him, as it is said, “The Lord, thy God, shalt thou fear” (Deut. 6:13; 10:20).
Mishneh Torah, Human Dispositions
It is a mandatory commandment to cleave to the wise and their disciples, in order to learn of their deeds, even as it is said on the subject: "And to Him shalt thou cleave" (Deut. 10.20). Is it possible to cleave to the Shekinah? But even thus the wise men commented upon in interpreting this commandment, saying: "Cleave to the wise men and their disciples" (Ketubot, 111b). Man shall, therefore, find the necessary means to take to wife the daughter of a disciple of the wise, and to give his daughter in marriage to a disciple of the wise; to eat and drink with the disciples of the wise, to do business for and with the disciples of the wise, and to associate with them in every form of companionship, even as it is said, "And to cleave to him" (Deut. 11.22). Even so have the wise men commanded, saying: "Sit amidst the dust of their feet, and drink their words with thirst" (Pirke Abot. 1.4.).2Pesahim, 49; Baba Batra, 126a; See Shabbat, 63a. G.