A woman of Banu Sulaym narrates: I asked Sayyiduna Uthman (bin Talhah) (may Allah be pleased with him): Why did the Prophet (peace and blessings be upon him) send (someone) for you (again) after he came out of the Ka'bah? He said: He (peace and blessings be upon him) said to me: "I saw the two horns of the ram, and I forgot to order you to cover them, for there should not be anything in the House (the Ka'bah) that distracts a person praying."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8364
Musafi' al-Hajabi narrates from his father, from his grandfather (Sayyiduna Uthman bin Talhah (may Allah be pleased with him)), that he saw the Messenger of Allah (peace and blessings be upon him) praying two rak'ahs behind the middle pillar of the Ka'bah; and in the House (of Allah), or he said: in the Ka'bah, there were three pillars.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8365
It is narrated from Sayyiduna Uthman bin Talhah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) prayed inside the Ka'bah.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8366