And every open vessel
An earthen one, as the Targum of Jonathan; and so Jarchi interprets it; and Maimonides F18 observes, that this is only to be understood of an earthen vessel:
which hath no covering bound upon it;
a linen or a woollen cloth wrapped and tied about it:
the air of the house getting into it by its being uncovered.
F18 In Misn. Cholin, c. 1. sect. 6.