Grandchildren are like children!<span class="x" onmousemove="('comment',' Infra 70a. It is now assumed that whenever one's own child died the grandchild may take his place in exempting his grandfather from the duty of propagation. From this it follows that only living children or grandchildren exempt a man from the duty of further propagation. How then could R. Huna maintain that dead children also exempt one from this duty?
');"><sup>1</sup></span> — This was taught only in respect of supplementing.<span class="x" onmousemove="('comment',' If a man had only one son he is exempt from the duty of propagation if his son had a daughter. If, however, he once had a male and a female who subsequently died he is in any case exempt.
');"><sup>2</sup></span> An objection was raised: Grandchildren are like children. If one of them died or was found to be a saris<span class="x" onmousemove="('comment',' V. Glos.
');"><sup>3</sup></span>
Minchat Chinukh
1. Laws of the Mitzvah etc. - [For reference, see] the Talmud - Yevamos 62, the Rambam - Laws of Marriage, Chapter 15, and the Shulchan Aruch Even HaEzer Seif (chapter) 1. The time of the mitzvah [i.e. when one is obligated] is from the age of 18, and one who proceeds [i.e. fulfills earlier than 18] is praiseworthy. [For reference] in regards to being involved in Torah studies [i.e. as potentially delaying one's fulfillment of the mitzvah] see in the aforementioned Rambam and the Maggid Mishnah [on the Rambam]. It is not necessary [to detail the laws regarding] the matter that is explicit in the Shulchan Aruch and Later Sages (Acharonim); however, there are some ideas and opinions to note with the help of Hashem.
