For somewhere he has spoken about the seventh day in these words: “On the seventh day God rested from all his works.”
OJBFor concerning Shabbos, the Yom HaShevi'i, Hashem has said somewhere, VAYISHBOT ELOHIM BAYOM HASHEVI'I MIKOL MELAKHTO (And He rested on the seventh day from all His work).
TCENTFor in one place it speaks about the seventh day as follows: “On the seventh day God rested from all his works.”
T4TWhat someone wrote somewhere in the Scriptures about the seventh day after he had spent six days creating the world, supports that: Then, on the seventh day, God rested from his work of creating everything.