Yevamot

Yevamot (Hebrew: יבמות, "Brother's Widow", also pronounced Yevamos, or Yavmus) is a tractate of the Talmud that deals with, among other concepts, the laws of Yibbum (ייבום, loosely translated in English as levirate marriage), and, briefly, with conversion to Judaism. This tractate is the first in the order of Nashim (נשים, "Women").

Yevamot, along with Eruvin and Niddah, is considered one of the three most difficult tractates in the Babylonian Talmud. A Hebrew mnemonic for the three is עני (ani, meaning "poverty").