Furthermore, the being intent on awakening emerges from his mother’s womb, mindful and aware. And then … an immeasurable, magnificent light appears … even in the boundless gloom of interstellar space … This is the second incredible and amazing thing that appears with the appearance of a Realized One.

Furthermore, the Realized One awakens to the supreme perfect awakening. And then … an immeasurable, magnificent light appears … even in the boundless gloom of interstellar space … This is the third incredible and amazing thing that appears with the appearance of a Realized One.

Furthermore, the Realized One rolls forth the supreme Wheel of Dhamma. And then … an immeasurable, magnificent light appears … even in the boundless gloom of interstellar space … This is the fourth incredible and amazing thing that appears with the appearance of a Realized One. With the appearance of a Realized One, the perfected one, the fully awakened Buddha, these four incredible and amazing things appear.”

Numbered Discourses 4.128 13. Fears Incredible Things About the Realized One (2nd)