The Messenger of Allah (ﷺ) as saying: He who has in his heart as much pride as much pride as grain of mustard-seed will not enter paradise. And he who has in his heart as much faith as grain of mustard-seed will not enter Hell.
Abu Dawud said: Al-Qasmali has transmitted it from Al-A'mash in a similar way.
Reference: Sunan Abi Dawud 4091 In-book : Book 34, Hadith 72 English translation : Book 33, Hadith 4080
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