Musannaf Ibn Abi Shayba 33:1275

Zayd ibn al-Hubab narrated to us, he said: Abu Sinan narrated to us, he said: I heard al-Dahhak ibn Muzahim saying regarding His saying: "So race to [all that is] good. To Allah is your return all together," he said: The nation of Muhammad, the righteous and the wicked.