Judg 5:4

“Adonoy, when You went forth from Seir, This refers to the giving of Torah, as it is said, "…and shone forth from Seir to them." Why is this relevant here? This is what Devorah said: "The Torah is severe when forsaken, but rewarding when adhered to, as it was given in awesomeness and power. Thus, the Yisroelites were handed over to their enemies for forsaking it; and, when they offered to engross themselves in it, they were saved." All this we learn from Targum Yonasan's rendition. Dripped. They dripped dew of revival.”

“Edom. Sinai, where God gave his law amid thunder and lightning, was situated in Idumea. (Calmet) — God displayed his glory on this mountain, and also on Mount Seir, Deuteronomy xxxiii. 2. Some believe that Debbora compares the wonders which attended the late victory, with those which God wrought when he led his victorious bands through the desert, and conquered the countries of Sehon, &c. (Haydock) — He provided for the wants of his people, even in the most desolate regions, giving them water out of the hard (Calmet) rock of Horeb or Sinai, (Haydock) and causing all nature to change her appearance at his approach, Psalm lxvii. 8., and Exodus xix. 18. (Calmet)”

“To give the Lord the glory for the victory which had been gained through His omnipotent help over the powerful army of Sisera, and to fill the heathen with fear of Jehovah, and the Israelites with love and confidence towards Him, the singer reverts to the terribly glorious manifestation of Jehovah in the olden time, when Israel was accepted as the nation of God (Ex 19). Just as Moses in his blessing (Deu 33:2) referred the tribes of Israel to this mighty act, as the source of all salvation and blessing for Israel, so the prophetess Deborah makes the praise of this glorious manifestation of God the starting-point of her praise of the great grace, which Jehovah as the faithful covenant God had displayed to His people in her own days. The tacit allusion to Moses' blessing is very unmistakeable. But whereas Moses describes the descent of the Lord upon Sinai (Ex 19), according to its gracious significance in relation to the tribes of Israel, as an objective fact (Jehovah came from Sinai, Deu 33:2), Deborah clothes the remembrance of it in the form of an address to God, to bring out the thought that the help which Israel had just experienced was a renewal of the coming of the Lord to His people. Jehovah's going out of Seir, and marching out of the fields of Edom, is to be interpreted in the same sense as His rising up from Seir (Deu 33:2). As the descent of the Lord upon Sinai is depicted there as a rising of the sun from the east, so the same descent in a black cloud amidst thunder, lightning, fire, and vapour of smoke (Exo 19:16, Exo 19:18), is represented here with direct allusion to these phenomena as a storm rising up from Seir in the east, in which the Lord advanced to meet His people as they came from the west to Sinai. Before the Lord, who came down upon Sinai in the storm and darkness of the cloud, the earth shook and the heaven dropped, or, as it is afterwards more definitely explained, the clouds dropped with water, emptied themselves of their abundance of water as they do in the case of a storm. The mountains shook (נזלוּ, Niphal of זלל, dropping the reduplication of the ל = נזלּוּ, Isa 63:19; Isa 64:2), even the strong rocky mountain of Sinai, which stood out so distinctly before the eyes of the singer, that she speaks of it as "this Sinai," pointing to it as though it were locally near. David's description of the miraculous guidance of Israel through the desert in Psa 68:8-9, is evidently founded upon this passage, though it by no means follows from this that the passage before us also treats of the journey through the desert, as Clericus supposes, or even of the presence of the Lord in the battle with Sisera, and the victory which it secured. But greatly as Israel had been exalted at Sinai by the Lord its God, it had fallen just as deeply into bondage to its oppressors through its own sins, until Deborah arose to help it (Jdg 5:6-8).”