It is narrated from Sayyiduna Abdullah ibn Abbas (may Allah be pleased with them both) that Sayyiduna Ali (may Allah be pleased with him) wore the clothes of the Noble Prophet (peace and blessings be upon him) and slept in his place. The polytheists used to throw stones at the Prophet (peace and blessings be upon him). Meanwhile, when Sayyiduna Abu Bakr (may Allah be pleased with him) came and Sayyiduna Ali (may Allah be pleased with him) was sleeping, while they thought he was the Messenger of Allah, so they said: "O Messenger of Allah!" Sayyiduna Ali (may Allah be pleased with him) replied: "The Prophet (peace and blessings be upon him) has gone towards the well of Maymoon, you should go and join him." Thus, Sayyiduna Abu Bakr (may Allah be pleased with him) set off in that direction and entered the cave with the Prophet (peace and blessings be upon him). Just as the Prophet (peace and blessings be upon him) used to be pelted with stones, in the same way, Sayyiduna Ali (may Allah be pleased with him) began to be pelted with stones, but he writhed in pain, and he had wrapped a cloth around his head. He did not take his head out until morning came. Then, when he removed the cloth from his head, the polytheists said: "Indeed, you are of a low rank. When we used to strike your companion, he would not writhe, but you writhe. We had already denied this matter (meaning, we had realized that the one sleeping here is not Muhammad)."