Rashi on Genesis 24:28/רש"י על בראשית כ״ד:כ״ח

1לבית אמה [AND TOLD IT] TO THEM OF HER MOTHER’S HOUSE — It was customary for the women to have their own apartments to sit in at their work — and a daughter, of course, confides only in her mother (Genesis Rabbah 60:7).