大般涅槃經義記 4.327

4.327

第三出華益物之中，初明「世尊心無疑慮」，不慮大眾不堪受法，次以相好莊嚴其身，後於身上出妙蓮華。文別有三：一明出華、二於華中放光出聲濟拔三塗、三華中現佛利益人天。

In the third [part], bringing forth flowers to benefit beings: first it explains that "the World-Honoured One's mind was free from doubt and anxiety," not worrying that the great assembly would be incapable of receiving the Dharma; next, he adorned his body with the major marks and minor characteristics; and finally, he brought forth wondrous lotus flowers from his body. The text has three distinct parts: first, it explains bringing forth flowers; second, from within the flowers he emits light and produces sounds to rescue the three wretched realms; third, within the flowers buddhas are manifested to benefit humans and devas.