Musannaf Ibn Abi Shayba 3:4881

7258. 'Abd al-A'la narrated to us, from Hisham, from al-Hasan, who said: A man sought permission to enter upon 'Amir ibn 'Abd Allah. He (the man) glorified Allah (said "Subhan Allah"), so he (the man) entered and sat until he (Amir) finished.