《北齐书·列传·卷二十七》
又跟随高祖在河阴攻破周文，刘丰功劳最大，高祖拉着手赞叹。
又从高祖破周文于河阴，丰功居多，高祖执手嗟赏。
When Liu Feng joined Emperor Gaozu’s army in attacking Zhou Wen at Heyin, he fought bravely and made the greatest contribution. Emperor Gaozu praised him with a handshake.