The river shall bring forth frogs. The frogs do not often come directly out of the river. They are bred in the pools and marshes which the Nile leaves as it is retiring. These, however, may be viewed as detached fragments of the river.
Thine house … thy bed-chamber … thy bed. The extreme cleanliness of the Egyptians (Herod. 2:37) rendered this visitation peculiarly disagreeable to them. The frogs under ordinary circumstances do not think of entering houses.
Ovens in Egypt were probably baking-pans. These were heated from within by a fire of wood, which was withdrawn after a time and the dough attached by pressure to the interior of the vessels. Kneading-troughs were vessels in which the dough was prepared.
Both these and ovens are represented in the Egyptian tombs. (See Rosellini,' Mon. Civ.' pl: 84, 85.