[15] And Moses went up into the mount, and a cloud covered the mount. [16] And the glory of the LORD abode upon mount Sinai, and the cloud covered it six days: and the seventh day he called unto Moses out of the midst of the cloud. [17] And the sight of the glory of the LORD was like devouring fire on the top of the mount in the eyes of the children of Israel. [18] And Moses went into the midst of the cloud, and gat him up into the mount: and Moses was in the mount forty days and forty nights.