《隋书·列传·卷十四》
皇上曾让他宣布圣旨，牛弘到阶下，不能说话，退回拜见皇上，道歉说： 我都忘了。 
上尝令其宣敕，弘至阶下，不能言，退还拜谢，云： 并忘之。 
The emperor once asked him to announce the imperial decree. Niu Hong went to the steps but couldn't speak. He went back and apologized to the emperor, saying, "I forgot all about it."