Exodus 24:17 DBY

¹⁵  And Moses went up to the mountain, and the cloud covered the mountain.

¹⁶  And the glory of Jehovah abode on mount Sinai, and the cloud covered it six days; and on the seventh day he called to Moses out of the midst of the cloud.

¹⁷  And the appearance of the glory of Jehovah was like a consuming fire on the top of the mountain, before the eyes of the children of Israel.

¹⁸  And Moses went into the midst of the cloud, and ascended the mountain. And Moses was on the mountain forty days and forty nights.