Reference for Gittin 159:5

הלכו הצרות האלו ונישאו ונמצאו אלו איילונית תצא מזה ומזה וכל הדרכים האלו בה

IF ANY OF THE NEAR RELATIVES CONCERNING WHOM IT IS LAID DOWN THAT THEIR RIVALS<span class="x" onmousemove="('comment',' I.e., (potential) co-wives. Cf. 1. Sam. I, 6. The reference is to two women within the forbidden degrees of consanguinity who married two brothers, v. Yeb. 22. ');">⁴</span>

Jastrow