Musannaf Ibn Abi Shayba 27:628

Al-Hasan ibn Musa narrated to us, he said: Hammad ibn Salamah narrated to us, from Ali ibn Zayd ibn Jud'an, from Bilal ibn Abi al-Darda', from Abu al-Darda', from the Prophet, may Allah bless him and grant him peace, who said: "The sky has not shaded, and the earth has not carried, anyone more truthful in speech than Abu Dharr."