John Trapp on Isaiah 45:8

Ver. 8. Drop down ye heavens from above] A prayer of the poor captives in Babylon, ſay ſome, for a ſpeedy performance of their promiſed deliverance: and this the rather, becauſe elſe Chriſt could not come of them, teach in their Country, work miracles, and fulfill the office of a Mediatour, as the Prophets had foretold. Whereunto God immediately anſwereth: I the Lord have created him, or will create him; that is, ſend him in due time, doubt ye not. Others make it a deſcription of Cyrus his juſt and happy raign; ſee the like of Solomon, Pſal. 72.6, 7. And indeed Cyrus is famous in Heathen Hiſtories for his wiſdom, juſtice, temperance, magnanimity and liberality; It is not the cuſtome of Cyrus to hoard up money,Cyrop. l. 8. ſaith Xenophon; for he taketh more delight in giving than in getting or poſſeſſing. But it ſeemeth rather to be a command from God of plenty and proſperity, oppoſite to that countermand, chap. 5.6. The Papiſts apply it to Chriſt, and his Mother: and hence their roaring out of Rorate, in their ſolemn ſervice, a moneth before the feaſt of the Nativity, and then they call for their carouſing cups.