איוב מא:יב פירוש: רש״י

From his nostrils smoke goes forth like a bubbling pot on the fire, which raises smoke.

and an earthenware vessel ואגמן. Its interpretation is according to its context: an expression of an earthenware vessel, like a bubbling pot; according to the matter that is stated (Jer. 1:13): “I see a bubbling pot.”