1 Now when Solomon [Sh'lomo] had made an end of praying [davening], the fire [eish] came down from heaven [Shomayim], and consumed the burnt offering [[olah] and the sacrifices [zevakhim] ; and the glory [kavod] of Yahweh filled the house [HaBeis].

The cherubim set up in the tabernacle and first temple were enveloped in a cloud of thick darkness (2 Chron. 5:14; 6:1). At night, the cloud which was visible without the former, appeared like a blaze of fire (Exod. 13:21), but in the day, it towered aloft as a pillar of cloud. Darkness and fire were frequent accompaniments of the divine presence; indeed, always so upon great occasions.

The presence of the Lord upon Mount Sinai was a magnificent and terrible example; and when Jesus expired in blood, Judea was veiled in darkness, and God looked upon it.

With the exception of the thunder, the earthquake, the tempest, and the flashing lightning, God's communing with Moses, and after him with the high priests, were conducted from between the cherubim, as upon Sinai -- 

"the Lord descended upon it in fire and the smoke thereof ascended as the smoke of a furnace, and God answered him by a voice" (Exod. 19:18, 19);

 so that the thick darkness became luminous and indicated His presence.

The illumination of the darkness without the voice would be sufficient to give assurance of acceptance. The priest having witnessed this on the great day of atonement, when he came out to the people, looking for Him with anxiety to know the result, would be enabled to report to them that the Lord had shined forth.

This was the sign to them of a typical salvation. Hence, Asaph prays, 

"give ear, O Shepherd of Israel; Thou that dwellest between the cherubim shine forth -- stir up Thy strength and come and save us. Turn us again, O God, cause Thy face to shine; and we shall be saved" (Psalm 80:1-3).

...It was customary with the Lord to answer men by fire when any great principle, or new institution was to be established. 

Thus, the covenant with Abraham was confirmed by fire (Gen. 15:17); there also came out a fire from before the Lord and consumed the offering on Aaron's induction as high priest (Lev. 9:24); when the plague was stayed at the intercession of David, the Lord answered him by fire from heaven upon the altar of burnt offering, and thus indicated the place He had chosen to place His name there (1 Chron. 21:16, 18, 26; 22:1); and also at the dedication of the temple fire consumed the sacrifices in the same way (2 Chron. 7:1).

Elpis Israel 1.5