觀無量壽佛經疏 3.43

3.43

Third, from "each" down to "yojanas," it directly explains the substance and measurement of the trees. This explains that all the jeweled groves and trees flow forth from Amitābha's untainted mind; because the Buddha's mind is untainted, the trees are likewise untainted. A praise says:
"From the Great Compassion of the True Path,
Arising from supramundane roots of goodness,
Pure radiance is fully replete,
Like a mirror, or the discs of the sun and moon."
Regarding the measurement, each tree is three hundred and twenty thousand li high; there are none that age or die, none that are small at birth, and none that are newly born and gradually grow. When they arise, they arise simultaneously and abruptly, equal and uniform in size and number. Why is this? That realm's status is an untainted and unborn realm; how could there be any meaning of birth, death, or gradual growth?