What did the Prophet Muhammad (saw) do when he entered the Ka'ba along with Usama bin Zaid, 'Uthman bin Talha and Bilal (peace be upon him)?
 Narrated Ibn `Umar:                     The Prophet entered the Ka`ba along with Usama bin Zaid, `Uthman bin Talha and Bilal and remained there for a long time. When they came out, I was the first man to enter the Ka`ba. I asked Bilal "Where did the Prophet pray?" Bilal replied, "Between the two front Pillars."