Related for Gittin 151:3
ת"ר הרי זה גיטך על מנת שתשמשי את אבא שתי שנים ועל מנת שתניקי את בני שתי שנים אע"פ שלא נתקיים התנאי הרי זה גט לפי שלא אמר לה אם תשמשי אם לא תשמשי אם תניקי ואם לא תניקי דברי רבי מאיר
But on R. Ashi's view, why should the ruling be different in the first case from that in the second?<span class="x" onmousemove="('comment',' I.e., in the first case also, if the child dies before she has suckled it one day, why should not the Get be void? ');"><sup>3</sup></span>
Tosefta Kiddushin
A man who said to a woman: "Behold you are betrothed to me with the understanding that I will talk to the ruler about you"; "[With the understanding that] I will work as a labourer with you", and he gave her something worth a perutah—she is betrothed immediately [even if he hasn't fulfilled his condition yet], until he says "I didn't speak [to the ruler]" or "I didn't work [as a labourer]" [when she becomes retroactively never betrothed]—words of Rabbi Meir. But Hakhamim say: If the stipulation is fulfilled—she is betrothed; but if not—she is not betrothed. (But see Lieberman who thinks this is about tenai kaful.) Rabban Shimon ben Gamliel says: There is no [valid] stipulation in the ketubah that isn't doubled (tenai kaful, that explains what would happen both if he did the thing he promised and also if he didn't do it).
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