Joseph Benson's Commentary of the Old and New Testaments - Exodus 7:19
Exodus 7:19. Upon their streams, &c., both in vessels of wood and vessels of stone “To what purpose this minuteness?” says the last-mentioned author. “May not the meaning be that the water of the Nile should not only look red and nauseous, like blood, in the river, but in their vessels too, and that no method of purifying it should take place, but, whether drunk out of vessels of wood or out of vessels of stone, by means of which they were wont to purge the Nile water, it should be the... read more
Albert Barnes' Notes on the Whole Bible - Exodus 7:19
The “streams” mean the natural branches of the Nile in Lower Egypt. The word “rivers” should rather be “canals”; they were of great extent, running parallel to the Nile, and communicating with it by sluices, which were opened at the rise, and closed at the subsidence of the inundation. The word rendered “ponds” refers either to natural fountains, or more probably to cisterns or tanks found in every town and village. The “pools”, literally “gathering of waters,” were the reservoirs, always large... read more