Musnad Imam Shafi'i

It is narrated from Muhammad bin Abdullah bin Harith bin Naufal (may Allah have mercy on him) that he heard Sa’d bin Abi Waqqas and Dahhak bin Qais (may Allah be pleased with them both) discussing Hajj Tamattu’ in the year when Mu’awiyah bin Abi Sufyan (may Allah be pleased with him) came for Hajj. Dahhak said, “Only the one who does not know the law of Allah will perform Hajj Tamattu’.” Sa’d (may Allah be pleased with him) said, “O nephew, you have not spoken well.” Dahhak said, “Indeed, ‘Umar (may Allah be pleased with him) forbade it.” So Sa’d (may Allah be pleased with him) said, “The Messenger of Allah (peace and blessings be upon him) performed Hajj Tamattu’ and we also performed Hajj Tamattu’ with him.”