John Trapp on Isaiah 19:5

Ver. 5. And the waters ſhall fail from the ſea] i. e. Their Sea-traffick ſhall be taken from them, to their very great loſs. Hiſtorians teſtifie, that by frequent Navigation out of the Bay of Arabia into India and Trogloditice, the revenue of Egypt was ſo encreaſed, that Auletes the father of Cleopatra received thence yearly twelve thouſand and five hundred Talents.

And the River ſhall be waſted and dryed up] i. e. The River Nilus, which watereth Egypt and maketh it fruitful: See Deut. 11.9, 10. Ezek. 29.3, 9.

Creditur Aegyptus caruiſſe juvantibus arvaOvid. Arf; lib. 1. Imbribus, at que annis ſicca fuiſſe novem.