וַיְדַבֵּ֥ר יְהוָ֖ה אֶל־מֹשֶׁ֥ה לֵּאמֹֽר׃
여호와께서 모세에게 일러 가라사대
Bartenura
חוץ מלילי יו"ט הראשון – and we derive it (Leviticus 23:6) “on the fifteenth day” and (Leviticus 23:33) “on the fifteenth day” from the holiday of Unleavened bread. Just as eating Matzah on the first night is obligatory, but from here and onward it is optional, so [dwelling in the] Sukkah as well.