Mukhtasar Muslim

Narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that Sayyiduna Abu Bakr Siddiq (may Allah be pleased with him) related to him, saying: I saw the feet of the polytheists above our heads while we were in the cave. I said: O Messenger of Allah! If any one of them looks down towards his feet, he will see us. The Prophet (peace and blessings of Allah be upon him) said: O Abu Bakr! What do you think of those two with whom the third is Allah?