Exodus 8:10

8:10 He said, “Tomorrow.” And Moses said, “It will be as you say, so that you may know that there is no one like the Lord our God.

Exodus 19:10

19:10 The Lord said to Moses, “Go to the people and sanctify them today and tomorrow, and make them wash their clothes

Exodus 32:5

32:5 When Aaron saw this, he built an altar before it, and Aaron made a proclamation and said, “Tomorrow will be a feast to the Lord.”