《明史·志·卷三十五》
依礼，父在为母服丧，期服用杖不上于堂，这是尊重父亲。
礼，父在为母，杖不上于堂，尊父也。
According to the rites, when a father is living, a son wears mourning clothes for his mother and cannot ascend to the hall with a stick in his hand, which shows respect for his father.