Musannaf Ibn Abi Shayba 33:1291

Affan narrated to us, he said: Hammad ibn Salamah narrated to us, he said: Thabit al-Bunani narrated to us, from Silah ibn Ashyam, that he said: "By Allah, I do not know which of my two days I am more joyful in: a day in which I go early to the remembrance of Allah, or a day in which I went out for some need of mine, and the remembrance of Allah presented itself to me."