Mahabharata — Ashvamedhika Parva, Shloka 343
Adhyāya 42 — Mahābhūta–Indriya–Adhyātma-Vyavasthā
Brahmā’s Instruction on Elements and Faculties
अण्डजानि विजानीयात् सर्वाश्वैव सरीसूपान् इनके अतिरिक्त जो दूसरे आकाशचारी प्राणी हैं तथा जो पेटसे चलनेवाले सर्प आदि हैं, उन सबको भी अण्डज जानना चाहिये
aṇḍajāni vijānīyāt sarvāṇy eva sarīsṛpān |
风神伐由说道：“凡一切爬行之类——如蛇等——皆当知为‘卵生’（aṇḍaja）。同样，那些在空中往来飞行的诸有情，也应认定属于卵生之类。”
वायुदेव उवाच
Educational Q&A
The verse teaches a traditional taxonomy of living beings: reptiles/creeping creatures (like snakes) and other sky-moving creatures are to be understood as aṇḍaja—born from eggs—highlighting a systematic way of knowing the natural world.
Vāyudeva is giving an instructive explanation, defining categories of birth and identifying which kinds of creatures fall under the ‘egg-born’ class.