A cupboard standing in the open air: If there is uncleanness within it, vessels in the [niches in the] thickness [of its walls] remain clean. If there is uncleanness in [the niches in] its thickness, vessels inside [the cupboard] remain clean. Rabbi Yose says: half and half. When it is standing inside a house: If there is uncleanness inside [the cupboard], the house is unclean; If there is uncleanness in the house that which is within [the cupboard] remains clean, for the manner of uncleanness is to go out and not to go in. Vessels which are between [the cupboard] and the ground, or between it and the wall, or between it and the roof-beams: If there is a space of one cubic handbreadth there, they become unclean. If not they remain clean. If there is uncleanness there, the house becomes unclean.

[In the case where] the cupboard is standing in the doorway and is opened outward, if there is uncleanness inside it, the house remains clean. If there is uncleanness in the house, that which is within [the cupboard] becomes unclean, for the manner of uncleanness is to go out and not to go in. If its wheeled base protruded three fingerbreadths behind it and there was uncleanness inside it under the roof-beams, the house remains clean. When does this ruling apply? When there is a space of one cubic handbreadth, when it is not easily detachable, and when the cupboard is of the stipulated size.