Reference for Yevamot 212:4
<big><strong>גמ׳</strong></big> אמר רב יהודה מצות חליצה קוראה וקורא וחולצת ורוקקה וקוראה מאי קמשמע לן מתני' היא הא קמשמע לן מצוה הכי ואי אפיך לית לן בה
THE PRACTICE WAS ESTABLISHED TO COMPLETE THE ENTIRE SECTION. [THAT] HIS NAME SHALL BE CALLED IN ISRAEL, 'THE HOUSE OF HIM THAT HAD HIS SHOE DRAWN<span class="x" onmousemove="('comment',' E.V., loosed. ');"><sup>16</sup></span> OFF',<span class="x" onmousemove="('comment',' Deut. XXV, 10. ');"><sup>17</sup></span> IS A COMMANDMENT [TO BE PERFORMED] BY THE JUDGES AND NOT BY THE DISCIPLES.<span class="x" onmousemove="('comment',' Who happen to be present when the halizah ceremony is being performed. ');"><sup>18</sup></span> R. JUDAH, HOWEVER, RULED: IT IS A DUTY INCUMBENT UPON ALL PRESENT TO CRY '[THE MAN]<span class="x" onmousemove="('comment',' E.V., him. ');"><sup>19</sup></span>