Mahapadanasutta 1.18.1

1.18.1

Dhammatā esā, bhikkhave, yadā bodhisatto mātukucchiṃ okkanto hoti, pakatiyā sīlavatī bodhisattamātā hoti, viratā pāṇātipātā, viratā adinnādānā, viratā kāmesumicchācārā, viratā musāvādā, viratā surāmerayamajjappamādaṭṭhānā.

It’s normal that, when the being intent on awakening is conceived in his mother’s womb, she becomes naturally ethical. She refrains from killing living creatures, stealing, sexual misconduct, lying, and beer, wine, and liquor intoxicants.