לְמַ֨עַן תִּירָ֜א אֶת־יְהוָ֣ה אֱלֹהֶ֗יךָ לִ֠שְׁמֹר אֶת־כָּל־חֻקֹּתָ֣יו וּמִצְוֺתָיו֮ אֲשֶׁ֣ר אָנֹכִ֣י מְצַוֶּךָ֒ אַתָּה֙ וּבִנְךָ֣ וּבֶן־בִּנְךָ֔ כֹּ֖ל יְמֵ֣י חַיֶּ֑יךָ וּלְמַ֖עַן יַאֲרִכֻ֥ן יָמֶֽיךָ׃
that thou mightest fear the LORD thy God, to keep all His statutes and His commandments, which I command thee, thou, and thy son, and thy son’s son, all the days of thy life; and that thy days may be prolonged.
Read halakhic rulings (Jewish law) on Deuteronomy 6:2: and classical halakhic sources.