B'chor Doing Avodah in Beis HaMikdash & Yerusha

I’ve heard that when Mashiach comes, the b’chorim will do the avodah. However, there is a famous story with the Chofetz Chaim that showed he held that when Mashiach comes, he, as a kohen, will do it. Maybe both will?

As for the C-section question, I asked that to a Rav, as my oldest is a boy who was born via c-section. I was told that all the halachos are the same except for pidyon haben.

Because he was not the ??? ???, the doctor was.

There is a big difference between pidyon haben and yerusha. Pidyon haben is peter rechem – 1st born of the mother. Pi shnayim for yerusha is reishis ono – 1st born of the father. A man with multiple wives could end up being podeh a son multiple times, but only one will get pi shnayim in the yerusha. Therefore, I don’t think we can compare the halachos of pidyon haben with yerusha. As for taanis bechorim, I’m not familiar with the halachos, but lav davka that the rules are comparable with pidyon haben and/or yerusha.

For a ???? to do the ????????? in the ?????????????????, does he have to be a ??? ???

I’m tempted to say yes because it says in ????? ?’ ?”?-?”?, that ??? ??? was taken “??? ?? ???? ??? ???”.

I was told that I have to fast until my son is 13.

Just came from a siyum. I’m wondering if it is preferable to fast or to have a siyum?

As far as the OT, perhaps the b’chorim will do the Avodah while the Kohanim, who are also Levyim obviously, will play the instruments and do what the Levyim do (along with the ‘plain’ Levyim.)

Another interesting issue is whether a Ger may be considered a b’chor, since a convert is considered to be ‘born again’ at the time of conversion. Probably not though since he is lacking peter rechem.

The Taanis Bechorim can’t be compared to Pidyon Haben at all.

If a woman has a miscarriage there is no Pidyon Haben but Taanis Bechorim does apply.

As Derech mentioned earlier the pasuk says that the kohanim were taken in place of the “peter rechem”s. This fits with Rashi who says that Eisav was created second but came out first.

????? ???? ???? ?????? ??? ?????, ???? ??? ???? ?? ?????, ???? ??? ???? ?????? ???? ?? ?????, ?? ???? ??????? ???? ????, ?? ?? ??? ????? ?? ??? ??, ?????? ?????? ??? ??????, ??????? ?????? ??? ??????, ???? ??? ???? ??????? ??? ?????, ????? ???? ?????? ??? ?????, ????? ?? ????? ???? ????? ????? ?????? ??????, ?????? ?? ????, ????? ?? ?????? ?? ????:

We see that Yacov had to buy the bechorah since eventhough he was created first the bechorah goes to whomever came out first.- peter rechem

However regarding the makas bechoros there is a chazal that explains why Hashem Himself had to kill the bechorim and not through a malach, because only Hashem can distinguish between a drop that produced a bechor and one that didn’t. This means that the bechorim that died in Makas bechoros were the fistborn to their father.

There are two reasons given for the taanis bechorim. I think that the Nafkah minah would be a C section. If we learn that they fast b/c of being spared in the Makah then all that matters is whether you are a first born to your father, however if it is for losing the avodah it would only apply to a peter rechem- one who opened his mother’s womb.