15 Then Moses went up on the mountain, and the cloud covered the mountain. 16 The glory of the Lord dwelt 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 Now the appearance of the glory of the Lord was like a devouring fire on the top of the mountain in the sight of the people of Israel. 18 Moses entered the cloud and went up on the mountain. And Moses was on the mountain forty days and forty nights.
25:1 The Lord said to Moses, 2 “Speak to the people of Israel, that they take for me a contribution. From every man whose heart moves him you shall receive the contribution for me. 3 And this is the contribution that you shall receive from them: gold, silver, and bronze, 4 blue and purple and scarlet yarns and fine twined linen, goats' hair, 5 tanned rams' skins, goatskins,  acacia wood, 6 oil for the lamps, spices for the anointing oil and for the fragrant incense, 7 onyx stones, and stones for setting, for the ephod and for the breastpiece. 8 And let them make me a sanctuary, that I may dwell in their midst. 9 Exactly as I show you concerning the pattern of the tabernacle, and of all its furniture, so you shall make it. (ESV)
 25:5 Uncertain; possibly dolphin skins, or dugong skins; compare 26:14