大乘起信論裂網疏 2.77

2.77

不思議用相者，依於淨智，能起一切勝妙境界，常無斷絕。謂如來身具足無量增上功德，隨眾生根，示現成就無量利益。

As for the mark of inconceivable function, relying upon pure wisdom, it can produce all superior and wondrous states without interruption. That is to say, the Tathāgata's body is fully endowed with immeasurable predominant merits, manifesting and accomplishing immeasurable benefits in accordance with the capacities of sentient beings.