Exodus 19
16 Ref And it cometh to pass, on the third day, while it is morning, that there are voices, and lightnings, and a heavy cloud, on the mount, and the sound of a trumpet very strong; and all the people who `are' in the camp do tremble.
17 Ref And Moses bringeth out the people to meet God from the camp, and they station themselves at the lower part of the mount,