From "The importance of living"

There was a devotee who has strong faith in Buddhism. She would chant "Ambitabha" three hundred times at night, before she sleeps, to accumulate good merit and blessing for her family. Her son was quite the opposite of her, for he does not believe in this practice of the religion. One night, when the women was chanting, the son would call out to her every time she finish one line. So she was irritated and asked the son to shut up. The son replied: "Wouldn't Buddha feel as irritated as you do if he can hear you calling out his name 300 times?"