摩訶止觀 7.64

7.64

若別教，明從假入空證真諦，名「空三昧」。二乘但證此空，猶有空相；菩薩知空非空，出假化物，無復空相，是名「無相三昧」；進修中道無中邊相，亦不求中邊，名「無作三昧」。此三觀智王臣（云云）。

Under the distinctive teaching, it explains entering emptiness from the provisional to realize the true truth, which is termed 'śūnyatā-samādhi'. The two vehicles merely realize this emptiness, still retaining the sign of emptiness; the bodhisattva knows that emptiness is not empty, and emerging into the provisional transforms sentient beings, no longer having the sign of emptiness, which is termed 'animitta-samādhi'; advancing to cultivate the middle way, there is no sign of middle or extremes, nor does one seek middle or extremes, which is termed 'apraṇihita-samādhi'. These three contemplative wisdoms are king and minister (and so forth).