Albert Barnes Commentary Exodus 8:3

"and the river shall swarm with frogs, which shall go up and come into thy house, and into thy bedchamber, and upon thy bed, and into the house of thy servants, and upon thy people, and into thine ovens, and into thy kneading-troughs:" — Exodus 8:3 (ASV)

Into thine house - This appears to have been special to the plague, as such. It was especially the visitation that would be felt by the scrupulously-clean Egyptians.

Kneadingtroughs - Not dough, as in the margin. See Exodus 12:34.