The Jewish Babylonian Talmud – Section Moed – Tract Sabbath – Regulations concerning the handling of utensils and furniture on the Sabbath.
p. 266 CHAPTER XVII. REGULATIONS CONCERNING THE HANDLING OF UTENSILS AND FURNITURE ON THE SABBATH. MISHNA: All utensils (and furniture) which may be handled on the Sabbath, their doors (lids) may be handled with them, even when their lids had been removed; for such lids cannot be considered as house-doors, which are not intended to be removed. One
