Avoiding scooping rice once is a custom passed down from ancient times. The ancients believed that: "Once offering rice, twice eating rice". Therefore, scooping rice once and giving it to a living person or a healthy person is unlucky and should be avoided.
In addition, many people believe that when scooping rice, only take one large scoop of rice and fill the bowl so that you don't have to scoop rice many times. However, this is also a taboo. The offering bowl of rice is usually eaten full, so when scooping rice every day, we should only leave the rice below the rim of the bowl, and not pile it up or fill it with too much rice.