Musannaf Ibn Abi Shayba 21:548

Yahya ibn Sa'id narrated to us, from 'Abdullah ibn Shabib, who said: I prayed beside Sa'id ibn al-Musayyib. When I sat in the second rak'ah, I raised my voice in supplication, and he rebuked me. When I finished, I said to him, "What did you dislike from me?" He said, "I thought that you believed Allah was not near to you."