וּבַחֲמִשָּׁ֨ה עָשָׂ֥ר י֛וֹם לַחֹ֥דֶשׁ הַזֶּ֖ה חָ֑ג שִׁבְעַ֣ת יָמִ֔ים מַצּ֖וֹת יֵאָכֵֽל׃
And on the fifteenth day of this month shall be a feast; seven days shall unleavened bread be eaten.
Read halakhic rulings (Jewish law) on Numbers 28:17: and classical halakhic sources.