Bismillah hir-Rahman nir-Rahim
Mafhum-e-Hadith : Allah ke saath Shirk karna aur waldein ki nafarmani karna sabsey badey gunaah hain
Abu Bakr Radi Allahu Anhu se rivayat hai ki Rasoollallah Sallallahu Alaihi Wasallam ne farmaya Kya main tumhey sabse badey Gunaah ke baarey mein khabar na du ? Sahaba ne arz kiya kyun nahi , phir Rasoollallah Sallallahu Alaihi Wasallam ne farmaya Allah ke saath Shirk karna aur walden ki nafarmani karna (sabsey badey gunaah hain) .
Sahih Bukhari, Vol7, 6273
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Narrated Abu Bakr Radi Allahu Anhu : Allah’s Apostle Sallallahu Alaihi Wasallam said, “Shall I inform you of the biggest of the great sins?” They said, “Yes, O Allah’s Apostle!” He Sallallahu Alaihi Wasallam said, “To join partners in worship with Allah, and to be undutiful to one’s parents. “
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Narrated Abu Bakr Radi Allahu Anhu : Allah’s Apostle Sallallahu Alaihi Wasallam said, “Shall I inform you of the biggest of the great sins?” They said, “Yes, O Allah’s Apostle!” He Sallallahu Alaihi Wasallam said, “To join partners in worship with Allah, and to be undutiful to one’s parents. “
Sahih Bukhari, Vol 8, Book 74, No. 290
ShukranAllah 
beshaq
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