《北史·列传·卷八十二》
北周建德六年，汤派使臣到北周，武帝任命汤为上开府仪同大将军、辽东郡公、辽东王。
周建德六年，汤遣使至周，武帝以汤为上开府仪同大将军、辽东郡公、辽东王。
In the sixth year of the Jiande era of the Northern Zhou dynasty, Tang sent envoys to the Northern Zhou, and Emperor Wu of the Northern Zhou appointed Tang as the General in Chief, Duke of Liaodong, and King of Liaodong.