Reference for Yevamot 63:1
ומקצתו חלוץ
and partially pulled down.<span class="x" onmousemove="('comment',' And the same procedure would unlawfully be followed in the case of two widows of the same brother. ');"><sup>1</sup></span> Well, let the assumption be made!<span class="x" onmousemove="('comment',' What objection can be raised against it? ');"><sup>2</sup></span> — Had he first contracted the levirate marriage and then participated in the <i>halizah</i>, no objection could be raised — 3 The preventive measure, however, has been enacted against the possibility of his participating in the <i>halizah</i> first and contracting the levirate marriage afterwards and thus placing himself under the prohibition of That doth not build up,<span class="x" onmousemove="('comment',' [H] Deut. XXV, 9. ');"><sup>4</sup></span>