Related על ראש השנה 3:8

All are obliged to blow the horn: priests, Levites, Israelites, proselytes, freed slaves, temple slaves, born of a forbidden marriage, mutilated by men, born by birth Mutilated, one with crushed testicles or one with a severed penis - they are all obliged and relieve the general public of their obligation. The tumtom and the hermaphrodite are obligated, but they do not absolve the public of their obligation. The hermaphrodite absolves its genus, but he does not absolve him who is not of his species [, of his duty]. The tumtom does not absolve either its genus or who is not of his species [his duty]. women, slaves and children are free and do not relieve the public of their duty.

Women, slaves and children are exempt [from saying Birkat Hamazon (Grace After Meals)], and they cannot absolve many [people, who include men] from their obligation [of saying Birkat Hamazon]. In reality, they (i.e. the Rabbis) said that a woman can say [Birkat Hamazon] for her husband, a son can say [Birkat Hamazon] for his father, [and] a slave can say [Birkat Hamazon] for his master.