三彌勒經疏 1.213

1.213

經曰「坐於龍華」以下，第二成菩提。此中五：一成道、二天龍雨華、三動世界怖魔、四放光引可度、五演梵音眾得益。是初也。謂樹枝如寶龍坐百寶華，故名龍華樹。依此樹下成菩提，故名菩提樹也。《大成佛經》云「早起出家，即是日初夜降魔成菩提也。」《彌勒來時經》云「到樹下坐，用四月八日明星時得佛。」解云：清且出家，初夜成佛也。

From the sūtra passage stating, "Sitting under the dragon-flower [tree]," onward is the second, realizing bodhi. Within this there are five: first, realizing the Way; second, devas and nāgas raining flowers; third, shaking the world to terrify Māra; fourth, emitting light to attract those who can be saved; and fifth, proclaiming the brahma voice so that the assembly attains benefit. This is the first. It is called the dragon-flower tree because its branches resemble jeweled dragons and it sits upon hundreds of jeweled flowers. Because he realizes bodhi beneath this tree, it is called the bodhi tree. The Great Attainment of Buddhahood Sūtra says: "Leaving home early in the morning, on that very day in the first watch of the night he subdued Māra and realized bodhi." The Sūtra on the Coming of Maitreya says: "He arrived and sat beneath the tree, and at the time of the morning star on the eighth day of the fourth month attained Buddhahood." The explanation says: he left home in the early morning and became a Buddha in the first watch of the night.