سنن ابن ماجه

It was narrated that Ibn ‘Umar said: “A man stood up and said to the Prophet (ﷺ): ‘O Messenger of Allah! What makes Hajj obligatory?’ He said: ‘Provision and a mount.’ He said: ‘O Messenger of Allah, what is the (real) Hajj?’ He said: ‘The one with dishevelled hair and no perfume.’ Another (man) stood up and said: ‘O Messenger of Allah, what is the (real) Hajj?’ He said: ‘Raising one’s voice and slaughtering the sacrificial animal.’”