Musannaf Ibn Abi Shaybah

Some people of Banu Salamah narrate that when Hazrat Amir Muawiyah had a spring made to flow near the graves of the martyrs, the spring passed over the graves of two martyrs, causing their graves to open. So the people cried out about them, and we took both of them out. They were wrapped together as if they had died just yesterday. There were two sheets on them, with which their faces were covered, and at their feet was placed the herb of Izkhir.