Musar do Izajasza 1:28

"We can infer from this the punishment of one who forsakes the Torah, about whom Isaiah has written (Isaiah 1:28): 'And the forsakers of the L-rd shall perish!' Woe to that shame! Woe to that humiliation! What will he do on the day of visitation? Is there an end to his punishment? According to the greatness of the reward [of one who studies it] is the greatness of the punishment of one who separates himself from it!