Trường Bộ Kinh (Digha Nikaya) 1:554
SUJATOPuna caparaṁ, ānanda, yadā bodhisatto tusitakāyā cavitvā sato sampajāno mātukucchiṁ okkamati, tadāyaṁ pathavī kampati saṅkampati sampakampati sampavedhati.
Furthermore, when the being intent on awakening passes away from the host of joyful gods, he’s conceived in his mother’s belly, mindful and aware. Then the earth shakes and rocks and trembles.