仁王經疏 3.397

3.397

釋曰：第四、入位住定。謂此位中，一切六度及四攝等行已滿足，具功德藏，入婆伽度，住佛慧三昧。梵音婆伽度，此云世尊，即十號中之一位也。住此位中，觀三身三昧方得圓滿。

The explanation says: Fourth, entering the stage and abiding in concentration. This means that in this stage, all practices such as the six pāramitās and the four means of embracing have already been fulfilled, the treasury of merits is possessed, one enters the Bhagavān [level], and abides in the Buddha-wisdom samādhi. The Sanskrit sound "Bhagavān" is translated here as "World-Honoured One," which is one stage among the ten epithets. Abiding in this stage, the contemplation of the samādhi of the three bodies is only then perfected.