大方廣圓覺修多羅了義經略疏 2.619

2.619

"If these bodhisattvas, through the power of utmost stillness, use it to assist quiescence (simultaneous cessation), and subsequently generate functions to transform worlds (combining illusion), this bodhisattva is said to cultivate śamatha and dhyāna simultaneously, and cultivate samāpatti afterward."