Musnad Ahmad 1081:0

Narrated to us by Muhammad ibn Ja’far, who said: Narrated to us Shu’bah, from Qatadah, from Anas ibn Malik, from Harithah ibn al-Nu’man, that the Prophet (ﷺ) said: "I entered Paradise, or I was in Paradise, and I heard the sound of footsteps. I said: 'Who is this?' They said: 'This is Harithah ibn al-Nu’man.' And he was the most dutiful of people to his mother."