《宋书·列传·卷七十八》
孝建元年他迁官丹阳尹，臧质反叛时孝武非常担心东方，让延孙出去做冠军将军、吴兴太守。
孝建元年，迁丹阳尹。臧质反叛，上深以东土为忧，出为冠军将军、吴兴太守，置佐史。
In the first year of Xiaojian reign, he was transferred to the official of Danying Yin. When Zang Zhi rebelled, Xiao Wu was very worried about the East and sent Yansun out to be the General of Champions and Prefect of Wuxing.