Reference for Yevamot 29:3
אי אמרת בשלמא עשו היינו דקאמר מה נעשה אלא אי אמרת לא עשו מאי מה נעשה
— R. Nahman b. Isaac replied: This<span class="x" onmousemove="('comment',' R. Simeon b. Gamaliel's precaution. ');"><sup>7</sup></span> was required only in the case of the rival herself;<span class="x" onmousemove="('comment',' Who may have married a stranger without previous halizah, in accordance with the ruling of Beth Hillel. It has no reference at all to the children, who would not be regarded bastards even according to Beth Shammai. ');"><sup>8</sup></span> and this is the meaning of the objection 'what shall we do': 'How shall we, according to Beth Shammai, proceed with those rivals [who married<span class="x" onmousemove="('comment',' Strangers, previously performing the halizah. ');"><sup>9</sup></span>