Isaiah 60:8

“Who are these that fly as a cloud, &c.] Referring to the vast number of converts before mentioned, who are compared to a “cloud” for the number of them, covering Judea as the clouds do the heavens; and for their elevation and situation, being raised from an earthly to a heavenly state; called with a high calling, and made partakers of an heavenly one; and for their being filled with the grace of God, as clouds with water; and for their unanimity, their coming together in a body, making as it were one cloud, and that openly and publicly, professing Christ, and joining themselves to his church, in the face of the world; and so the Targum, “who are these that come publicly as the swift clouds?”…”

“The prophet, seeing in vision new hosts approaching quickly like a cloud of doves, asks who they are.”

“Who are these that fly as a cloud? - In multitudes so numerous, that they appear as a dense cloud. The prophet, in vision, sees a vast multitude coming to Jerusalem, or hastening to embrace the true religion - so numerous as to excite surprise, and to lead to the question, Who can they be? (compare Isaiah 49:21.) It is not uncommon to compare a multitude of persons to a cloud. Thus Livy (xxxv. 49), Rex contra peditum equitumque nubes jactat. Thus in Hebrews 12:1, the number of witnesses who are said to encompass Christians is compared to a cloud (νέφος μαρτύρων nephos marturōn). So Virgil (Geor. iv. 60) compares a swarm of bees to a cloud - obscuramque trahi vento mirabere nubem. The…”

“A cloud - These metaphors import the number as well as speed, of those that should be begotten by the apostles doctrine. Isaiah 60:9”

“fly: Isa 60:4, Isa 45:22; Luk 13:29; Rev 7:9 a cloud: Heb 12:1 as the: Gen 8:8-11 Isaiah 60:9”

“From the mainland, over which caravans and flocks are coming, the prophet now turns his eyes to the sea. "Who are these who fly hither as a cloud, and like the doves to their windows? Yea, the islands wait for me; and the ships of Tarshish come first, to bring thy children from far, their silver and gold with them, to the name of thy God, and to the holy One of Israel, because He hath ornamented thee." Upon the sea there appear first of all enigmatical shapes, driving along as swiftly as if they were light clouds flying before the wind ( Isa 19:1; Isa 45:22), or like doves flying to their dovecots (celeres cavis se turribus abdunt, as Ovid says), i.e., to the round towers with their numerous…”