仁王護國般若波羅蜜多經疏 2.63

2.63

解曰：動相滅時者，第十地末最後定也。言動相者，如《起信論》云「如風依水而有動相，無明依真而起業相。」今等學位，如風滅故，動相隨滅而水不滅，彼無明滅，業相隨滅而真不滅，故說此位言動相滅也。名金剛定者，謂諸菩薩至此位中所依勝定猶如金剛，悉能斷除微細障故。從此第四明如來地。

Explanation: 'When the characteristics of movement are extinguished' refers to the final samādhi at the end of the tenth bhūmi. As for 'characteristics of movement', the Awakening of Faith says: 'Just as wind depending on water produces characteristics of movement, ignorance depending on reality gives rise to the characteristic of karma.' Now in the stage of equal awakening, because the wind is extinguished, the characteristics of movement are extinguished along with it while the water is not extinguished; when that ignorance is extinguished, the characteristic of karma is extinguished along with it while reality is not extinguished. Therefore this stage is spoken of as 'the characteristics of movement are extinguished'. 'Called the vajra samādhi' means that the superior samādhi relied upon by bodhisattvas reaching this stage is like a vajra, capable of severing all subtle obscurations. Next is the fourth [part], explaining the Tathāgata stage.