《新唐书·列传·卷五十》
景云年中，父亲死，有诏令起复为工部侍郎，苏颋辞谢不受，辞理恳切，诏许他依例服丧，丧期满后就职。
遭父丧，起为工部侍郎，辞不拜，终制乃就职。
During Jingyun Period, his father died. An imperial edict ordered him to resume his position as deputy head of the Ministry of Industry, but Su Zhaoxu begged off the offer and declined. His arguments were heartfelt and sincere, and the emperor allowed him to mourn his father according to the regulations. He took up his post after the mourning period expired.