觀彌勒上生兜率天經贊 2.191

2.191

贊曰：第三、禮拜投誠也。以首至地，晝夜相續，除罪百億劫，身心等歸並皆重故。此為最重，見毫第二，一念頃第三，聞名合掌第四，輕重異故。

The commentary says: Third is bowing in veneration and offering wholehearted devotion. Because the head touches the ground continuously day and night, it eradicates the sins of a hundred billion kalpas, since taking refuge with both body and mind is weighty. This is the most weighty; seeing the ūrṇā is second, a single thought-moment is third, and hearing the name and joining palms is fourth, because they differ in lightness and weight.