וְהַבָּא֙ אֶל־הַבַּ֔יִת כָּל־יְמֵ֖י הִסְגִּ֣יר אֹת֑וֹ יִטְמָ֖א עַד־הָעָֽרֶב׃
Moreover he that goeth into the house all the while that it is shut up shall be unclean until the even.
Targum Jonathan on Leviticus
And whoever goeth into the house in the days that it is shut up, shall be unclean until evening.