Be Ye Holy
Three months after Israel left Egypt, they arrived at the base of Mount Sinai and set up camp. Moses climbed that rugged mountain to commune with the Lord. God called to him and said:
"I am going to come to you in the form of a dark cloud so that the people themselves can hear me when I talk to you, and then they will always believe you. Go down and get the people ready for my visit…Sanctify them…