“…I have learned this in the presence of the Buddha: ‘When the being intent on awakening emerges from his mother’s womb, then—in this world with its gods, Māras and Brahmās, this population with its ascetics and brahmins, gods and humans—an immeasurable, magnificent light appears, surpassing the glory of the gods. Even in the boundless desolation of interstellar space—so utterly dark that even the light of the moon and the sun, so mighty and powerful, makes no impression—an immeasurable, magnificent light appears, surpassing the glory of the gods. And the sentient beings reborn there recognize each other by that light: “So, it seems other sentient beings have been reborn here!” And this galaxy shakes and rocks and trembles. And an immeasurable, magnificent light appears in the world, surpassing the glory of the gods.’ This too I remember as an incredible and amazing quality of the Buddha.”
—Spoken by Venerable Ānanda
Read the entire translation of Majjhima Nikāya 123 Acchariyaabbhutasutta: Incredible and Amazing by Bhikkhu Sujato on SuttaCentral.net. Or read a different translation on DhammaTalks.org.