וַיַּעֲמִידֵ֣ם לָעַ֣ד לְעוֹלָ֑ם חָק־נָ֝תַ֗ן וְלֹ֣א יַעֲבֽוֹר׃
Dia menegakkan mereka untuk selama-lamanya; Dia telah memberikan suatu ketetapan yang tidak akan dilanggar.
Rashi
He issued a decree to them, that this one should serve by day and that one should serve by night. which will not change That decree.