Q: I need to ask a question, within the shia kutb, do we find narrators (rijal) who may have been against the imams of ahl al bayt, meaning the enemies of ahl al bayt within the isnads?
Also, shias quote that Umar ibn Sa’d is within the sahih sittah and in bukhari he is within around 800 isnads. Please can I ask, did bukhari use these narratives as corraboratory (shawahid and muta’ba ah) or did he have stand alone narrations with Umar ibn Sa’d within the isnad?
Did bukhari see Umar ibn Sa’d as a just – adl, trustworthy person and was he not of the taabiun?
A: Salam alaikum wa rahmatullah.
We can divide your question in 2 parts.
1) Nawasib (enemies of ahlalbait) in shia books.
2) Umar ibn Sad and his place in the books of ahadeth.
1) Yes, shias narrated from people which they do believe were nawasib. And nawasib are kuffar in accordance to their school.
As an example you can see this: https://gift2shias.com/2010/07/18/nawasib-narrator-in-shia-books/
2) Umar ibn Sad ibn Abu Waqas az-Zuhri was tabein, a person who preferred this world to hereafter, and he was the leader of kufian army which fought against Husayn (r.a).
When imam of jarh and tadeel, Yahya ibn Maeen was asked is Umar thiqat? He answered: How is it possible for him to be thiqat, if he killed Husayn (r.a)? (Mizanul itidal 3/199).
As for shia claim that he was a narrator in sihah as-sitta, and in Bukhari he is in 800 places. Obviously that is nothing but a lie. Because when we check bio of Umar in such books like “Mizanul itidal”,”Tahzeeb at-Tahzeeb” or “Tahzeeb al-Kamal” we can see only the letter sin [ س ] next to his name. And that is mean that from author of 6 books, only Nasai alone narrated from him.