《水经注·卷十六》
渠水从铜驼街往东流经司马门南边。魏明帝开始筑网时，门胭崩塌下来，压死了数百人，于是就不再建筑，所以没有胭。
渠水自铜驼街东径司马门南，魏明帝始筑，阙崩，压杀数百人，遂不复筑，故无阙门。
The canal water flows eastward from Tongtu Street to the south of Simamen. When Emperor Wei Ming began to build the net, the gate screen collapsed and hundreds of people were crushed to death. Therefore, it was not built again, so there was no screen.