Nehemiah 9:13

And he said to them, “This is what Yahweh has spoken: Tomorrow is a sabbath observance, a holy sabbath to Yahweh. Bake what you will bake and boil what you will boil, and all that is in excess put aside to be kept until morning.”

And Yahweh came down on Mount Sinai, to the top of the mountain; and Yahweh called Moses to the top of the mountain, and Moses went up.

Then Yahweh said to Moses, “Thus you shall say to the sons of Israel, ‘You yourselves have seen that I have spoken to you from heaven.

“Out of the heavens He caused you to hear His voice to discipline you; and on earth He caused you to see His great fire, and you heard His words from the midst of the fire.

You have commanded us, To keep Your precepts diligently.