Paṇītatarasutta
Sāvatthinidānaṁ. “Catasso imā, bhikkhave, nāgayoniyo. Katamā catasso? Aṇḍajā nāgā, jalābujā nāgā, saṁsedajā nāgā, opapātikā nāgā. Tatra, bhikkhave, aṇḍajehi nāgehi jalābujā ca saṁsedajā ca opapātikā ca nāgā paṇītatarā. Tatra, bhikkhave, aṇḍajehi ca jalābujehi ca nāgehi saṁsedajā ca opapātikā ca nāgā paṇītatarā. Tatra, bhikkhave, aṇḍajehi ca jalābujehi ca saṁsedajehi ca nāgehi opapātikā nāgā paṇītatarā. Imā kho, bhikkhave, catasso nāgayoniyo”ti.
Better
At Sāvatthī. “Mendicants, dragons reproduce in these four ways. What four? Dragons are born from an egg, from a womb, from moisture, or spontaneously. Of these, dragons born from a womb, from moisture, or spontaneously are better than those born from an egg. Dragons born from moisture or spontaneously are better than those born from an egg or from a womb. Dragons born spontaneously are better than those born from an egg, from a womb, or from moisture. These are the four ways that dragons reproduce.”