Whoever spares the rod hates their children, but the one who loves their children is careful to discipline them.
OJBHe that spareth his shevet (rod) hateth bno (his son), but he that loveth him is diligent in his musar (discipline).
T4TThose who do not punish their children for bad behavior do not really love them; those who love their children start to discipline them when the children are still young.