כיצד אשת אחיו שלא היה בעולמו. שני אחים ומת אחד מהם ונולד להן אח ואחר כך יבם השני את אשת אחיו ומת. הראשונה יוצאת משום אשת אחיו שלא היה בעולמו. והשנייה משום צרתה. עשה בה מאמר ומת שנייה חולצת ולא מתיבמת:
What is the case of “the wife of his brother who died before he was born”? If there were two brothers, and one of them died, and then a third brother was born, and then the second brother had yibbum with his dead brother’s wife and then died himself, the first woman is exempt as the wife of his brother who died before he was born, and the second wife [is exempt] because she is her rival wife. If he had ma’amar with her and died, the second wife, must perform halitzah but may not have yibbum.