It is narrated from Sayyiduna Uthman bin Talhah that the Prophet (peace and blessings be upon him) prayed two rak'ahs inside the Ka'bah. According to another chain, he prayed them between the two pillars directly in front upon entering. It is narrated from Sayyiduna Uthman bin Talhah that when the Prophet (peace and blessings be upon him) entered the Ka'bah, he prayed two rak'ahs between the two pillars directly in front.
Hadith Referenceمسند احمد / مسند المكيين / 15387
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف الانقطاعه، عروة بن الزبير لم يسمع من عثمان بن طلحة