Musannaf Ibn Abi Shaybah 15888 — Where one prays inside the House

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him), Sayyiduna Uthman bin Talhah (may Allah be pleased with him) and Sayyiduna Bilal (may Allah be pleased with him) entered the Ka'bah, and the door remained closed for a long time. When the door was opened, I was the first to go in, and I met Sayyiduna Bilal and asked him: "Where did the Prophet (peace and blessings be upon him) pray?" Sayyiduna Bilal said: "Between the two front pillars."