楞伽阿跋多羅寶經註解 2.100

2.100

如來禪者，即首楞嚴定，修此禪定登妙覺地，究竟自覺聖智。三種樂住者，佛以首楞嚴定為能住之法，常寂光土為所住之處。常寂光即三德涅槃也，三種樂住其在茲乎。不思議事者，是無作妙用，謂全體起用，成就眾生也。

The Tathāgata dhyāna is the Śūraṅgama samādhi. Cultivating this dhyāna, one ascends to the stage of wondrous enlightenment, perfecting pratyātmāryajñāna. The 'three kinds of blissful abodes': the Buddha takes the Śūraṅgama samādhi as the dharma of abiding, and the Land of Eternally Quiescent Light as the place of abiding. The Eternally Quiescent Light is the Nirvāṇa of the Three Virtues; do not the three kinds of blissful abodes reside in this? 'Inconceivable deeds' are the effortless, wondrous functions; they mean the whole essence arising into function to bring sentient beings to maturity.