《南史·列传·卷十六》
起初，刘毅平时所骑的马隔在了城外无法进来，他仓促之间没有马骑，便让人到他儿子刘肃那里去要马，刘肃不给。
初，毅常所乘马在城外不得入，仓卒无马，使就子肃取马，肃不与。
Originally, Liu Yi's usual horse was kept outside the city walls and he could not bring it in, and in this moment of urgency he did not have a horse to ride, so he sent someone to his son, Liu Su, to ask for a horse, but Liu Su refused.