金光明經文句記 3.351

3.351

初、釋生身業。雖通通教，今且在藏，以其通教是大乘門，利人能見後二佛故。今就三藏修行事度，為相好因。言修百福成一相者，論存多解，今明一種。大千眾生遇緣當死，一一救之皆得壽命，是為一福。此福至百方成一相，此指伏惑事度所成，令彼眾生効此修之，今見生身。

First, explaining the karma of the manifested body. Although it extends to the shared teaching, it is here temporarily located in the Tripiṭaka [teaching], because the shared teaching is a gate of the Great Vehicle, and people of sharp faculties can see the latter two Buddhas. Here we take the phenomenal perfections cultivated in the Tripiṭaka as the cause of the marks and minor signs. Regarding the statement that 'cultivating a hundred merits accomplishes one mark,' treatises preserve many explanations, and we now clarify one. If the sentient beings of a great trichiliocosm encounter conditions and are about to die, saving each one of them so that they obtain life constitutes one merit. Only when such merits reach a hundred is one mark accomplished. This refers to what is accomplished by phenomenal perfections that subdue defilements, prompting those sentient beings to follow this and cultivate it, so that they now see the manifested body.