仁王經疏 2.185

2.185

釋曰：第五釋地別名。義謂極喜地亦名為住，智住理故。即彼般若亦名為地，生諸德故。

Commentary: Fifth, explaining the distinct names of the bhūmi. The meaning is that the Stage of Extreme Joy is also called an abiding, because wisdom abides in the principle. That very prajñā is also called a bhūmi, because it produces all virtues.