Reference for Temurah 49:56

מותיב רבי אלעזר

An objection was raised: If one says to his [pregnant] bondwoman, 'Be thou a slave but thy child shall be free', if she was pregnant she obtains [freedom] in his behalf.<span class="x" onmousemove="('comment',' And the child goes out free; v. Git. 23b.');">⁴⁵</span>

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