Devarim 11:19-21

Orthodox Jewish Bible

¹⁹ And ye shall teach them your banim, speaking of them when thou sittest in thine bais, and when thou walkest by the way, when thou liest down, and when thou risest up.

²⁰ And thou shalt write them upon the mezuzot of thine bais, and upon thy she’arim;

²¹ That your yamim may be multiplied, and the yamim of your banim, in ha’adamah which Hashem swore unto Avoteichem to give them, as the yamim of Shomayim upon ha’aretz (i.e., as long as the heavens are above the earth).