華嚴經明法品內立三寶章 2.22

2.22

四、業用者，亦有四：一、此理法身與諸觀智為所開覺，經云「法身說法，授與義故。」二、依此以起報化利生，勝業用故。三、或作樹等，密攝化故。四、遍諸塵道毛端等處，重重自在，無礙業用也。

Fourth, its activities and functions also have four: 1. This dharmakāya of principle serves as what is awakened by the various contemplative wisdoms; as the sūtra says, 'The dharmakāya expounds the Dharma because it confers meaning.' 2. Relying on this, it gives rise to the saṃbhoga and nirmāṇa [bodies] to benefit sentient beings, because it is a supreme activity and function. 3. Or it manifests as trees and the like, secretly gathering and transforming [beings]. 4. It pervades all dust motes, hair tips, and other places, an activity and function of manifold sovereignty and non-obstruction.