Saṁyutta Nikāya:
III. Khandhā Vagga:
29: Nāga Saṁutta
Kindred Sayings on Nāgas
Sutta 2
Paṇītatara Suttaṁ
Pre-eminent
Thus have I heard:
The Exalted One was once staying near Sāvatthī
at the Jeta Grove in Anāthapiṇḍika's Park.
And there the Exalted One addressed the brethren, saying:
"Brethren!"
"Master!" responded those brethren.
The Exalted One said:
"There are these four sorts of birth, brethren,
as nāgas.
What four?
The egg-born,
the womb-born
the sweat-born,
those born without parents.
Herein, brethren, the womb-born,
the sweat-born
and those born without parents
are better than1 the egg-born.
The sweat-borned1
and those born without parents
are better than the womb-born
and the egg-born.
Those born without parents,
are better than the sweat-born
the womb-born,
and the egg-born.
Such, brethren, are the four sorts of births as nāgas.'
These, brethren, are the four sorts of birth as nāgas.
1 Paṇītatara
ed1 Woodward abridges as follows:
Herein, brethren, the womb-born,
the sweat-born
and those born without parents
are better than the egg-born.
The two latter sorts
are better than the two former,
and the last three
are better than the egg-born.
which would repeat the first sequence for the last sequence.