"A man asked the Messenger of Allah (ﷺ) which deed is best. He said: 'Faith in Allah.' He said: 'Then what?' He said: 'Jihad in the cause of Allah.' He said: 'Then what?' He said: 'Hajjun Mabrur.'" [1] [1] Hajj, that is accepted, or free of sin.
Reference: Sunan an-Nasa'i 3130 In-book : Book 25, Hadith 46 English translation : Vol. 1, Book 25, Hadith 3132
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