Hadith 1115:39
Ishaq ibn Yusuf narrated to us, Ibn Abi Rawwad narrated to us, from Nafi’, from Ibn Umar, who said: The Messenger of Allah, peace and blessings of Allah be upon him, ascended the House (the Kaaba), and Bilal was behind him. He said: And I was a young man, so I ascended, and Bilal met me. I said to him: "What did the Messenger of Allah do here?" He said: "He gestured with his hand," meaning he prayed two rak'ahs.
حدثنا إسحاق بن يوسف، حدثنا ابن أبي رواد، عن نافع، عن ابن عمر، قال: صعد رسول الله صلى الله عليه وسلم البيت وبلال خلفه، قال: وكنت شابا فصعدت فاستقبلني بلال، فقلت له: ما صنع رسول الله هاهنا؟ قال: " فأشار بيده أي صلى ركعتين "