金剛經纂要刊定記 3.94

3.94

福相者。經從「須菩提！於意云何？若人滿三千大千世界七寶以用布施；乃至須菩提！所謂佛法者即非佛法。」斯則以持說此經獲無漏福，所感微妙色身，名為福相也。然是法身之福相，福相非法身。依主釋。

Regarding "the mark of merit": the sūtra goes from "Subhūti, what do you think? If a person filled a trichiliocosm with the seven treasures in order to practice generosity..." up to "...Subhūti, what is called Buddha-dharma is not Buddha-dharma." This means that by upholding and expounding this sūtra one obtains outflow-free merit, which brings about the sublime physical body; this is called the mark of merit. However, it is the mark of merit of the dharmakāya; the mark of merit is not the dharmakāya. This is a genitive compound (tatpuruṣa).