It is narrated from Sayyiduna Abu Tufail (may Allah be pleased with him), who was mentioning the construction of the Ka'bah during the time of ignorance. He said: The Quraysh demolished the Ka'bah and then began to build it with stones from the valley. They would carry stones on their necks. They raised the building to a height of twenty cubits. The Noble Prophet (peace and blessings be upon him) would also bring stones from Ajyad, carrying them. He (peace and blessings be upon him) had tied a striped sheet, which was narrow. When he (peace and blessings be upon him) wanted to place it on his shoulder, due to its small size, his private parts began to show. Someone called out: O Muhammad! Cover your private parts. In another narration, it is said: Then he was called out: Do not uncover your private parts. So he (peace and blessings be upon him) threw down the stone and tied his sheet. After that, he (peace and blessings be upon him) was never seen in a naked state.