The wife of Rab always prepared the reverse of what her husband asked, for instance, beans instead of lentils, etc. Her son, R. Hiya, growing up, noticed her disposition and told her the reverse of his father’s wishes. She then prepared exactly what her husband wished. Rab was greatly surprised at the change; his son explained the reason and the father asked his son to discontinue lest he accustomed himself to tell untruths.