《明史·列传·卷八十六》
大概当时曾铣已经有了收复河套地区的奏议，夏言从中赞助，所以世宗极力压制通贡的主张。后来世宗就把收复河套的事情交给各处边关的守臣商议了。
盖是时曾铣有复套之议，夏言主之，故力绌贡议，且以复套事行诸边臣议之。
Zeng Xi probably already had a plan to recover the Hetao region at the time, and Xia Yan supported him, so Shizong went to great lengths to suppress the proposal for paying tribute. Later, Shizong handed the matter of recovering Hetao over to local border officials for their counsel.