At Sāvatthī.

Seated to one side, that mendicant said to the Buddha:

“Sir, what is the cause, what is the reason why someone, when their body breaks up, after death, is reborn in the company of the womb-born phoenixes … moisture-born phoenixes … or spontaneously-born phoenixes?”

(All should be told in full.)

The Linked Discourses on phoenixes are complete.