Musannaf Ibn Abi Shayba 16:1064

Abu Bakr narrated to us, he said: Ibn ‘Ulayyah narrated to us, from Ibn ‘Awn, who said: There were cushions in the gathering of Muhammad [Ibn Sirin] that had images of sparrows on them. Some people were speaking about that. Muhammad said: "These people have said too much; if only you would turn them over."