Exodus 19:23-25

23And Moses said unto Yhwh, The people cannot come up to mount Sinai: for thou chargedst us, saying, Set bounds about the mount, and sanctify it.

24And Yhwh said unto him, Away, get thee down, and thou shalt come up, thou, and Aaron with thee: but let not the priests and the people break through to come up unto Yhwh, lest he break forth upon them.

25So Moses went down unto the people, and spake unto them.