b"Yevamot 13 : Marc Chipkin : 2022-03-20 The co-wife and co-wife's co-wife. Beit Shammai allows the co-wife of an ervah. Not splitting into factions. https://drive.google.com/file/d/174Fmd8s5tksYVgqRMS-XhHKIs4L3MY1A/view?usp=drivesdk"