Hadith 8:2383
Abu Bakr narrated to us, he said: Abu Usama narrated to us, from Ubaydullah, from Nafi’, from Ibn Umar: That the Messenger of Allah (ﷺ) entered the Kaaba, and Usama bin Zayd and Uthman bin Talha [were with him]. He remained in the House for a long time. Then Ibn Umar entered after him, being the first of the people [to do so]. I asked Bilal, "Where did the Messenger of Allah (ﷺ) pray?" He said, "Between the two front pillars." He said, "And I forgot to ask him how many [rak'ahs] he prayed."
حدثنا أبو بكر قال حدثنا أبو أسامة عن عبيد الله عن نافع عن بن عمر أن رسول الله صلى الله عليه وسلم دخل الكعبة وأسامة بن زيد وعثمان بن طلحة فمكث في البيت فأطال ثم دخل بن عمر في أثره أول الناس فسألت بلالا أين صلى رسول الله صلى الله عليه وسلم قال بين العمودين المقدمين قال ونسيت أن أسأله كم صلى