Abu Qilabah said: Umar bin Abdul Aziz, may Allah have mercy on him, came out for the Zuhr prayer and he had a paper with him. Then when he came for the Asr prayer, that paper was still with him. So I asked: O Commander of the Faithful! What is this book? He replied: This is the hadith that Awn bin Abdullah narrated to me. I liked it, so I wrote it down. When I looked, it was that very hadith written on it, i.e., the aforementioned hadith.