《太平广记·卷三百九十·冢墓二》
史书上记载：夏后氏烧土为砖做棺，大约这就是那时的墓葬。
载记云，夏后氏堲周，盖其时也。
Historical records state that in the times of Lord Xia, earth was fired to make bricks with which to construct coffins. Perhaps this was a type of entombment custom at that time.