仁王護國般若波羅蜜多經 2.79

2.79

"Great King! All the merits of Prajñāpāramitā are immeasurable, like empty space. If anyone receives, upholds, reads, and recites it, the merit obtained will be able to protect humane kings and all sentient beings, just like an enclosing wall, or like a city rampart. Therefore, you should all receive and uphold it."