Yankele’s Bo Bayom Bar Mitzva was on a Friday. His parents made a special Seudah for his
classmates on Thursday evening. They finished with the meal 10 minutes after shkia
and bentched before Tzeis Hakochavim (night).
Does Yankele have to repeat the bentching again after Tzeis Hakochavim ? (within 72 minutes
after finishing the meal )
R.Akivah Eiger (Haghaos R.A.E. Shulchan Aruch O. Ch. 184 :2 ) asks, what creates the Chiyuv
of Bentching , is it the Achila & Sevia or maybe only the Sevia is the mechayev and not the Achila*.
Yankele, ate while he was a Koton, but was still satisfied (full) when he became a Godol.(within 72 minutes)
If you need both Achila & Sevia then Yankele doesn’t need to repeat the Bentching.
(there was no achila as a godol)
If all you need is Sevia , then Yankele would be required to Bentch again. When he Benched
The first time he was a Koton and wasn’t mechuyav to bentch. Now that he is a Godol and is
still satisfied, he is required to Bentch again Mideorysa .
*The Torah saidואכלת to teach, that you need a מעשה אכילה for the Sevia.
(If fed with a feeding tube, bentching is not required.) and not that
the achila is the mechayav.