俱舍論頌疏論本 23.4

23.4

釋曰：依已修成止，為觀修念住者，依前二門已修成止，梵云奢摩多，此云止也。次應為觀，修四念住。觀者，梵云毘鉢舍那，即是慧也。

The explanation says: As for "Relying on calm abiding already cultivated to completion, / For the sake of insight, one cultivates the applications of mindfulness": relying on the preceding two portals, calm abiding has already been cultivated to completion—in Sanskrit it is called śamatha, which here means 'calm abiding' (zhi). Next, for the sake of insight, one should cultivate the four applications of mindfulness. 'Insight' in Sanskrit is called vipaśyanā, which is wisdom (prajñā).