Musnad Ahmad 706:0

Narrated to us by Yahya ibn Sa’id, from Shu’bah, who said: Narrated to us Qatadah, from Abu al-Maliyah, from ‘Amir ibn Mas’ud al-Jumahi, from the Prophet (ﷺ), who said: "The Hajj is the ‘Arafah." He said: And narrated to us Muhammad ibn Ja’far, narrated to us Shu’bah, from Qatadah, from Abu al-Maliyah, from ‘Amir ibn Mas’ud, from the Prophet (ﷺ), who said: "The Hajj is ‘Arafah."