Reference for Gittin 159:7

כתב סופר גט לאיש ושובר לאשה וטעה ונתן גט לאשה ושובר לאיש ונתנו זה לזה

WAS INCAPABLE OF BEARING,<span class="x" onmousemove="('comment',' Her marriage consequently was void, and hence the sister-in-law could have married the deceased husband's brother and had no right to contract another marriage without giving halizah. ');">⁶</span>

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