It is reported from Uthman bin Talhah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) prayed inside the Ka'bah.
Hammad bin Salamah alone narrated it, and there is a break (irsal) in it between Urwah and Uthman.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3790