“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.’”
Sunan Ibn Majah Book 25, Hadith 15