Authentication

Objections against the Ahaadith of Fazaail Aamaal

Q: I am troubled by a comment someone has made to me regarding the Fazaail Aamaal. We grew up reading it, and so did this person. But now suddenly, through the influence of another person, this person says that Fazaail Aamaal is a "Tabligh kitaab" which is unreliable as it contains weak Ahaadith. 

Can you please explain to me whether Fazaail Aamaal is a reliable kitaab or not.

Disbelievers in the time of Nabi Nooh (alaihis salaam) afflicted with a skin disease

Q: I want to know if this is authentic: 

When Nooh (alaihis salaam) was building his ark then the disbelievers came and defecated on the ship. Allah Ta'ala sent a certain skin disease upon these people which they had no cure for. So one disbeliever with the disease slips near the ship and falls into the faeces then realizes he has been cured. All disbelievers then came and cleaned the ship by applying all the faeces to their own bodies.

Rasulullah (sallallahu alaihi wasallam) taking an oath that he will not have relations with Maria Qibtia (radhiyallahu anha)

Q: There are some ahaadeeth like the one quoted by Maulana Maududi which states that the Holy Prophet (sallallahu alaihi wasallam) had intercourse with Maria Qibtia (radhiyallahu anha) and he then swore never to have intercourse with her after facing pressure from Hazrat Ayesha and Hamza (radhiyallahu anhuma)... Is it true?