Most of us aware that in accordance to shias, each and every hadith from aimma is equal to prophetic ahadeth. Meaning: Imam said = prophet (sallalahu alaihi wa ala alihi wa sallam).
But here question isn’t about that. The one who brought shariah of Islam to this earth, taught it, fought against its enemies – was Muhammad ibn Abdullah (sallalahu alaihi wa ala alihi wa sallam).
In shia world there are 4 main shia books:
1) Kafi of Kulayni.
2) Al Istibsar of Toose.
3) At-Tahzib of Toose.
4) Man la yahduruhul faqih of Saduq.
For example number of traditions in al-Kafi is 15,181; according to another reckoning 15,176.
Can we ask shias to bring us from these mentioned 4 books, 5 ahadeth from each of them. 5 ahadeth which could be traced back directly to prophet (sallalahu alaihi wa ala alihi wa sallam), 5 ahadeth which would be reported from prophet (sallalahu alaihi wa ala alihi wa sallam) by someone who seen him, meaning that there wouldn’t be any gap in the chain.
For sure, we are not asking for such ahadeth with weak chains, chains of there ahadeth should contain only narrators which were praised in shia books of rijaal.
I don’t know, how many time this could take. But I do believe that 2 weeks would be fine for research, or for sending emails to marajia, to get an answer from them.