Hadith 8:2384
Abu Bakr narrated to us, he said: Al-Hasan ibn Musa narrated to us, he said: Hammad ibn Salamah narrated to us, from Hisham ibn Urwah, from his father, from Uthman ibn Talhah, that the Prophet, may Allah bless him and grant him peace, prayed the two rak'ahs when he entered.
حدثنا أبو بكر قال حدثنا الحسن بن موسى قال حدثنا حماد بن سلمة عن هشام بن عروة عن أبيه عن عثمان بن طلحة أن النبي صلى الله عليه وسلم صلى الركعتين حين دخل