《南史·列传·卷四十九》
时间久了，他便感叹说： 接受别人的东西，必须要报答；否则就会对人有愧。
久而叹曰： 受人者必报；不则有愧于人。
As time passed, he lamented and said: "When accepting other people's belongings, one must express gratitude. Otherwise, one would feel guilty toward them."