仁王護國般若波羅蜜多經疏 3.81

3.81

解曰：證空三昧者，若證生空即得初果，故偈所明苦諦行故。或聞法證空，即法空理，至初地也。從此第二眷屬悟空。

Explanation: "Realized the samādhi of emptiness": if he realized the emptiness of persons, he attained the first fruit, because what the verses clarified was the practice of the truth of suffering. Or, hearing the Dharma and realizing emptiness was precisely the principle of the emptiness of phenomena, reaching the first bhūmi. From here, the second part concerns the retinue awakening to emptiness.