Leviticus 16:10
8 and Aaron is to cast lots over the two goats, one lot for the Lord and one lot for Azazel. 9 Aaron must then present the goat which has been designated by lot for the Lord, and he is to make it a sin offering, 10 but the goat which has been designated by lot for Azazel is to be stood alive before the Lord to make atonement on it by sending it away into the desert to Azazel. 11 “Aaron is to present the sin-offering bull which is for himself, and he is to make atonement on behalf of himself and his household. He is to slaughter the sin-offering bull which is for himself, 12 and take a censer full of coals of fire from the altar before the Lord and a full double handful of finely ground fragrant incense, and bring them inside the curtain.
1 Enoch 54:5
3 And there mine eyes saw how they made these their instruments, iron chains of immeasurable weight. 4 And I asked the angel of peace who went with me, saying: 'For whom are these chains being prepared?' 5 And he said unto me: 'These are being prepared for the hosts of Azâzêl, so that they may take them and cast them into the abyss of complete condemnation, and they shall cover their jaws with rough stones as the Lord of Spirits commanded. 6 And Michael, and Gabriel, and Raphael, and Phanuel shall take hold of them on that great day, and cast them on that day into the burning furnace, that the Lord of Spirits may take vengeance on them for their unrighteousness in becoming subject to Satan and leading astray those who dwell on the earth.' 7 'And in those days shall punishment come from the Lord of Spirits, and he will open all the chambers of waters which are above the heavens, and of the fountains which are beneath the earth.
Notes and References
"... although the appearance of Pan and his satyric retinue is identical to the Western devil, it is not easy to connect these figures to the demonic more than other pagan deities. Pan is referred to as “demon” by early Christian authors, but only as one of a group of pagan deities-“demons/daemons” (Clement of Alexandria, Protrepticus 1 and 4; Eusebius, Praeparatio Evangelica 5.5.189d; 5.18.208a) ... At the same time, similar figures may be identifiable independently as early as the Hebrew Bible itself. The demon Azazel (Leviticus 16:10 and 26) had goat associations through one of the possible etymologies of the name, as well as through the ritual of scapegoats. Azazel/Asael appears as a principal evil spirit as far back as 1 Enoch (8:1; 9:6; 10:4–8; 13:1–2; 54:5; 55:4; 69:2), as well as in many later Jewish sources ..."
Kulik, Alexander How the Devil Got His Hooves and Horns: The Origin of the Motif and the Implied Demonology of 3 Baruch (pp. 195-229) Brill, 2013