It comes from a letter which Chu Fou,a general under Liu Hsiu of the Eastern Han Dynasty,wrote to Peng Chung,the prefect of Yuyang. In context it reads,

• 这句话出于东汉时刘秀的一位将军叫朱浮的写给渔阳太守彭宠的一封信，那信上说：“凡举事无为亲厚者所痛，而为见仇者所快。”