摩訶止觀 2.130

2.130

別相者，身有三種：一者色身，二者法門身，三者實相身。若息化論歸者，色身歸解脫，法門身歸般若，實相身歸法身。

As for the specific aspects, there are three kinds of bodies: first, the physical body; second, the Dharma-door body; and third, the body of true reality. If one discusses their return in terms of the cessation of transformation: the physical body returns to vimokṣa, the Dharma-door body returns to prajñā, and the body of true reality returns to the dharmakāya.