Exodus 8:3; Exodus 12:34

Exodus 8:3

3 The Nile will teem with frogs. They will come up into your palace and your bedroom and onto your bed, into the houses of your officials and on your people, and into your ovens and kneading troughs.

Exodus 12:34

34 So the people took their dough before the yeast was added, and carried it on their shoulders in kneading troughs wrapped in clothing.