三彌勒經疏 1.108

1.108

第三見聖不同者，聖有三身：一真身，則法報。二應身，則八相成道。三化身，隨時忽有。此中真身常寂無往來相，故生天者非所見，唯見菩薩應化二身。

Regarding the third, differences in seeing the noble one: the noble one has three bodies: first, the true body, which is the dharma and saṃbhoga [bodies]; second, the response body, which is the attainment of the Way through the eight aspects; third, the transformation body, which suddenly exists according to the time. Herein, the true body is eternally quiescent without the marks of coming and going; therefore, those born in heaven do not see it; they only see the bodhisattva’s two bodies of response and transformation.