It is a continual burnt offering that was instituted on Mount Sinai as a pleasing aroma, an offering made by fire to the Lord.

“You came down on Mount Sinai and spoke with them from heaven. You provided them with just judgments, true laws, and good statutes and commandments.

the earth shakes, yes, the heavens pour down rain before God, the God of Sinai, ¹  before God, the God of Israel. ² 

¹ When ²  they journeyed from Elim, the entire company ³  of Israelites came to the Desert of Sin, which is between Elim and Sinai, on the fifteenth day of the second month after their exodus ⁴  from the land of Egypt.

Now Mount Sinai was completely covered with smoke because the Lord had descended on it in fire, and its smoke went up like the smoke of a great furnace, ¹  and the whole mountain shook ²  violently.

Moses said to the Lord, “The people are not able to come up to Mount Sinai, because you solemnly warned us, ¹  ‘Set boundaries for the mountain and set it apart.’” ² 

The glory of the Lord resided ¹  on Mount Sinai, and the cloud covered it for six days. ²  On the seventh day he called to Moses from within the cloud.

So Moses ¹  cut out two tablets of stone like the first; ²  early in the morning he went up ³  to Mount Sinai, just as the Lord had commanded him, and he took in his hand the two tablets of stone.

¹ Now the Lord ²  spoke ³  to Moses in the tent of meeting ⁴  in the wilderness ⁵  of Sinai ⁶  on the first day of the second month of the second year after ⁷  the Israelites ⁸  departed from the land of Egypt. ⁹  He said:

Nadab and Abihu died ¹  before the Lord ²  when they offered ³  strange ⁴  fire ⁵  before the Lord in the wilderness of Sinai, and they had no children. ⁶  So Eleazar and Ithamar ministered as priests ⁷  in the presence of ⁸  Aaron their father.

And they observed the Passover ¹  on the fourteenth day of the first month at twilight in the wilderness of Sinai; in accordance with all that the Lord had commanded Moses, so the Israelites did.

But there was not a man among these who had been ¹  among those numbered by Moses and Aaron the priest when they numbered the Israelites in the wilderness of Sinai.

¹ Now when Moses came down ²  from Mount Sinai with ³  the two tablets of the testimony in his hand ⁴  – when he came down ⁵  from the mountain, Moses ⁶  did not know that the skin of his face shone ⁷  while he talked with him.

He said:The Lord came from Sinai and revealed himself ¹  to Israel ²  from Seir. He appeared in splendor ³  from Mount Paran, and came forth with ten thousand holy ones. ⁴  With his right hand he gave a fiery law ⁵  to them.