Judaism and Mormonism of priests that took place at Israel's Tabernacle, the temple of Solomon, and later temples in Jerusalem (see Exod. 28:40–42, 29:4–9, 29:20–21, 29:29–30, 30:18–21). The Hebrew Bible recounts several cases of polygamy among the ancient Hebrews. One source of polygamy was the practice of levirate marriage, wherein a man was required to marry and support his brother's widow. Ashkenazi Jewry has not practiced polygamy since Rabbenu Gershom's ban in the 11th century "except in exceptional circumstances requiring obtaining in advance the permission of 100 rabbis." Some Sephardi and Mizrahi groups, in particular those from Yemen and Iran (where polygamy is
Sephardi Hebrew the Ashkenazi pronunciation was derived from that of Palestine in Geonic times (7th-11th centuries) and that the Sephardi pronunciation was derived from that of Babylonia. The theory was supported by the fact that in some respects, Ashkenazi Hebrew resembles the western dialect of Syriac, and Sephardi Hebrew resembles the eastern dialect: Eastern Syriac "Peshitta" as against Western Syriac "Peshito". Ashkenazi Hebrew, in its written form, also resembles Palestinian Hebrew in its tendency to "malē" spellings (see Mater lectionis). Others, including Abraham Zevi Idelsohn, believed that the distinction is more ancient and represents the distinction between the Judaean and Galilean dialects