《明史·本纪·卷十六》
六月二十八日，吏部尚书刘宇兼文渊阁大学士，参与机要事务。
六月戊子，吏部尚书刘宇兼文渊阁大学士，预机务。
June 28th, Liu Yu, minister of the Ministry of Personnel, served as senior academician of Wenyuange and participated in confidential affairs.