觀無量壽佛經疏 3.46

3.46

Sixth, from "These jeweled groves" down to "bearing fruits of seven jewels," it explains that although the groves of trees are many, they are not disordered. When the flowers and fruits open, they do not emerge from inside; this is because the causal [vows of] Dharmākara were profound, bringing them about spontaneously.