Halakhah for Yevamot 34:7
ואיצטריך למכתב אחים ואיצטריך למכתב יחדו דאי כתב רחמנא אחים ה"א לילף אחוה אחוה מלוט וכי תימא לא מפני לאיי אפנויי מפני מדהוה ליה למכתב רעים וכתיב אחים שמע מינה לאפנויי כתב רחמנא יחדו המיוחדים בנחלה
Let him, then, deduce this 'brotherhood'<span class="x" onmousemove="('comment',' The expression 'brethren' in Deut. xxv, 5 in relation to the levirate marriage. ');"><sup>19</sup></span> from the 'brotherhood' in the case of Lot, since it is written in the Scriptures. For we are brethren!<span class="x" onmousemove="('comment',' Gen. Xlii, 8. Lot having been Abraham's nephew the deduction would establish a novel law of marriage with a deceased uncle's or nephew's widow. ');"><sup>20</sup></span> -It stands to reason that the deduction should be made from the sons of Jacob. because the [analogous expression] is available for the purpose;<span class="x" onmousemove="('comment',' Lit., 'vacant'. ');"><sup>21</sup></span> for it could have been written, Thy servants are twelve sons of one man<span class="x" onmousemove="('comment',' Gen. XLII, 23. Cur. edd., read, in. stead of 'one man', 'our father', which occurs in v. 32. If the reference were to the latter verse 'thy servants' which does not occur there would have to be deleted here. Several MSS. support the reading here adopted. ');"><sup>22</sup></span>