Musnad Ahmad 334:18

Abu Salamah al-Khuza'i narrated to us, he said: Ya'la ibn al-Harith informed us, he said: Iyas ibn Salamah ibn al-Akwa' informed us, and Abu Ahmad al-Zubayri said: Ya'la narrated to us, he said: Iyas ibn Salamah narrated to me, from his father, who said: "We used to pray the Friday prayer with the Prophet, may Allah bless him and grant him peace, then we would return while the walls had no shade to seek shelter in."