大方廣圓覺修多羅了義經 1.61

1.61

「若諸菩薩唯取極靜，由靜力故永斷煩惱究竟成就，不起于座便入涅槃；此菩薩者，名單修奢摩他。

"If bodhisattvas grasp only utmost stillness, and through the power of stillness forever sever kleśas and attain ultimate realization, entering nirvāṇa without rising from their seats, these bodhisattvas are called those who cultivate śamatha alone.