《宋书·列传·卷九十六》
叶延非常孝顺，母亲病了，三天没吃下一点东西，叶延便三天不吃饭。
性至孝，母病，三日不能食，叶延亦不食。
Ye Yan was very filial, when his mother became sick and did not eat a morsel for three days, he refrained from food for three days as well.