Musnad Ahmad 459:3

Hammad ibn Khalid al-Khayyat narrated to us, Mu'awiyah—meaning Ibn Salih—narrated to us, from Yunus ibn Sayf, from al-Harith ibn Ziyad, from Abu Ruhm, from Irbad ibn Sariyah, who said: The Messenger of Allah, may Allah bless him and grant him peace, invited me to the suhoor (pre-dawn meal) in Ramadan. He said: "Come to this blessed meal."