111:5 One must search for chometz in all places, in the holes and cracks as much as possible, and in the pockets of his clothes and those of his children. Since one sometimes puts chometz in these things, they require checking. One must shake them out well the following day, when he burns the chometz.
111:6 The rooms that one sells to a non-Jew along with the chometz must be checked. This is because the sale does not take effect until the following day, so the obligation to check still applies the night of the search.