TSK · Exodus 19:20

and be ready for the third day, for on the third day the LORD will come down on Mount Sinai in the sight of all the people.

Moses went up the mountain, and the cloud covered the mountain.

Be prepared in the morning, and go up in the morning to Mount Sinai, and station yourself for me there on the top of the mountain.

When I went up the mountain to receive the stone tablets, the tablets of the covenant that the LORD made with you, I remained there forty days and nights, eating and drinking nothing.

In your distress you called out and I rescued you. I answered you from a dark thundercloud. I tested you at the waters of Meribah.(Selah)