Halakhah su Deuteronomio 16:3

It is a biblical commandment to recite Shema at night and in the morning, as the Torah states in the paragraphs of Shema and Ve-haya im Shamo’a: “When you lie down and when you rise.” It is also a mitzva to mention the Exodus during the day and at night, as the Torah states: “So that you remember the day you left Egypt every day of your life” (Devarim 16:3). The Torah seems to add a superfluous word (“kol yemei ḥayekha” instead of just “yemei ḥayekha”), from which the Sages derive that the mitzva to remember the Exodus is performed both during the day and at night (Berakhot 12b). For that reason, Va-yomer is also recited at night, since it mentions the Exodus at the end. Va-yomer, which discusses the mitzva of tzitzit, primarily applies to the day, and although one can fulfill the nighttime mitzva of mentioning the Exodus with other verses, common practice is to recall it by reciting Va-yomer, since it is familiar to all (Tosafot Yom Tov ad loc.). Combined with the first two paragraphs, it contains 248 words (above, 16:11), and by reciting all three paragraphs, one fully accepts the yoke of heaven (above, 16:4-5).

It is a biblical commandment to remember the Exodus every day, as the Torah says: “So that you remember the day you left Egypt every day of your life” (Devarim 16:3). The Torah seems to add a superfluous word (“kol yemei ḥayekha” instead of just “yemei ḥayekha”), from which the Sages derive that the mitzva to remember the Exodus is performed both during the day and at night (Berakhot 12b). This mitzva can be fulfilled by reciting any verse that discusses leaving Egypt or by mentioning the Exodus in one’s own words.

Rabbi Elazar ben Azariah said to them, "Behold I am like a man of seventy years and I have not merited [to understand why] the exodus from Egypt should be said at night until Ben Zoma expounded it, as it is stated (Deuteronomy 16:3), 'In order that you remember the day of your going out from the land of Egypt all the days of your life' - 'the days of your life' [indicates that the remembrance be invoked during] the days; 'all the days of your life' [indicates that the remembrance be invoked also during] the nights." But the Sages say, "'The days of your life' [indicates that the remembrance be invoked in] this world, 'all the days of your life' [indicates that the remembrance be invoked also in] the days of the Messiah."