Musnad Ahmad 938:90

Surayj narrated to us, Ibn Abi al-Zinad informed us, from his father, from Kharijah ibn Zayd, who said: Zayd ibn Thabit said: Allah, the Mighty and Majestic, revealed to His Messenger, may Allah bless him and grant him peace, while I was at his side, and he mentioned the like of it.