Is the hadith “If there were to be a Prophet after me, it would be ‘Umar” saheeh?

Some of the Sahabah (may Allah be pleased with them) who memorised the Book of Allah, may He be exalted

Doubting the character and sincerity of the Sahaabah will lead to doubting the religion completely

Oath of allegiance and inheritance between Abu Bakr and ‘Umar on the one hand, and ‘Ali and Faatimah on the other

The story of the Sahaabi who used to make the Prophet (blessings and peace of Allah be upon him) laugh

Was Waraqah ibn Nawfal a Companion?

Was there anyone among the Sahaabah who did not get married because of seeking knowledge?

A munkar (odd) report accusing ‘Aa’ishah of killing ‘Uthmaan and wanting to kill ‘Ali (may Allah have mercy on them all)

The hadith “Woe to ‘Ammaar; he will be killed by the transgressing group; he will be calling them to Paradise and they will be calling him to Hell,” and refutation of the specious argument which quotes it to cast aspersions upon Mu‘aawiyah

Are the jinn who met the Prophet (blessings and peace of Allah be upon him) and believed in him regarded as being among the Sahaabah?