Musnad Ahmad 3:87

'Affan narrated to us, Hammad ibn Salamah narrated to us, from Yunus, from 'Ata' ibn Farrukh, from 'Uthman ibn 'Affan, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Allah admitted a man into Paradise who was easy-going: as a judge and as a litigant, and as a seller and as a buyer."