geniza

— The rule of burying the old Scrolls which became spoiled or torn was in course of time extended to all Hebrew books which became torn or spoiled. This, indirectly, probably led to the well-known practice of having special places called Geniza, where such books were temporarily kept before being buried[…]. In almost all Jewish centers, there are Genizot in the synagogues—under the Bima, within the walls, or in the garrets. As the place grew overcrowded, the content was carried to the cemetery for burial.