《元史·列传·卷六十四》
颢以父年迈，极力请求回清州侍养，帝特命颢的长子孝伯任知州以便奉养。
颢以父年老，力请归养清州，帝特命颢长子孝伯为知州以就养。
Hao earnestly requested to return to Qingzhou to serve his father because his father was old. The emperor specially ordered Hao's eldest son Xiao Bo to serve as the governor so that he could support him.