《资治通鉴·汉纪·汉纪五十二》
牛辅等率军迎击李肃。李肃战败，逃回弘农，被吕布处死。牛辅心中惶恐不安，恰巧遇上军营中无故发生夜惊，牛辅想弃军逃走，被左右亲信杀死。
辅恇怯失守，会营中无故自惊，辅欲走，为左右所杀。
Niu Fu and his troops confronted Li Su. Li Su was defeated and fled back to Hongnong, where he was killed by Lv Bu. Niu Fu was terrified. It happened that there was a false alarm in the camp at night. Niu Fu tried to flee, but was killed by his own followers.