佛頂尊勝陀羅尼經教跡義記 1.43

1.43

第二釋薄伽梵身者，有其三義：一、報身；二、化身；三、法身。第一報身者，為地上菩薩說法。第二化身，為二乘人說法。第三法身者，法身常寂自利利他。雖有三種不同為見不異，異如聲聞見丈六身，菩薩見無邊身，諸佛見法性身，如是一繩生於三相，如眼暗為是其蛇，眼明者見其繩，智者審觀唯見其麻，報化法身亦復如是。若其通也，即三是一，即一是三。若其述也，即三非三，即一非一，如水氷波三種有異，即水是氷、即水是水，水外無波、波外無水，報化法身亦復如是。此即第二釋薄伽梵身竟。

As for the second, explaining the body of the Bhagavān, there are three meanings: first, the reward body; second, the transformation body; third, the Dharma body. The first, the reward body, preaches the Dharma for bodhisattvas on the stages. The second, the transformation body, preaches the Dharma for persons of the two vehicles. As for the third, the Dharma body, the Dharma body is ever-quiescent, benefiting oneself and benefiting others. Although there are three different kinds, as seen they are not different. The difference is like a śrāvaka seeing a sixteen-foot body, a bodhisattva seeing a boundless body, and the buddhas seeing the body of reality-nature: just as a single rope gives rise to three aspects—where the dim-sighted take it to be a snake, those with clear eyes see the rope, and the wise upon close examination see only hemp—the reward, transformation, and Dharma bodies are also just like this. If taken comprehensively, the three are one, and the one is three. If taken analytically, the three are not three, and the one is not one. Just as water, ice, and waves are three different things, yet water is ice and water is water, outside of water there are no waves, and outside of waves there is no water; the reward, transformation, and Dharma bodies are also just like this. This concludes the second [section], explaining the body of the Bhagavān.