《旧唐书·本纪·卷十三》
沧州程怀直前来朝见，赐给他安业坊住宅、妓女一人，令他返回沧州镇守。
沧州程怀直来朝，赐安业坊宅，妓一人，复令还镇。
Cheng Huai of Cangzhou came to pay homage. He was bestowed an estate at Anye Square and a prostitute. He was ordered to return to Cangzhou to guard the place.