לְאַֽהֲבָה֙ אֶת־יְהוָ֣ה אֱלֹהֶ֔יךָ לִשְׁמֹ֥עַ בְּקֹל֖וֹ וּלְדָבְקָה־ב֑וֹ כִּ֣י ה֤וּא חַיֶּ֙יךָ֙ וְאֹ֣רֶךְ יָמֶ֔יךָ לָשֶׁ֣בֶת עַל־הָאֲדָמָ֗ה אֲשֶׁר֩ נִשְׁבַּ֨ע יְהוָ֧ה לַאֲבֹתֶ֛יךָ לְאַבְרָהָ֛ם לְיִצְחָ֥ק וּֽלְיַעֲקֹ֖ב לָתֵ֥ת לָהֶֽם׃ (פ)
to love the LORD thy God, to hearken to His voice, and to cleave unto Him; for that is thy life, and the length of thy days; that thou mayest dwell in the land which the LORD swore unto thy fathers, to Abraham, to Isaac, and to Jacob, to give them.
Pirkei Avot
He used to say: The more flesh, the more worms; The more property, the more anxiety; The more wives, the more witchcraft; The more female slaves, the more lewdness; The more slaves, the more robbery; [But] the more Torah, the more life; The more sitting [in the company of scholars], the more wisdom; The more counsel, the more understanding; The more charity, the more peace. If one acquires a good name, he has acquired something for himself; If one acquires for himself knowledge of Torah, he has acquired life in the world to come.