Dutiyavagga

Suttapiṭaka · Saṁyuttanikāya · Sagāthāvaggasaṁyutta · Vol. 15 · Section 446

[446] On one occasion the Blessed One was dwelling at Rājagaha, on Mount Gijjhakūṭa. Now on that occasion the Blessed One was seated in the open air in the blinding darkness of the night, and the rain (devo) was falling drop by drop.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 15 · Section 804 — Sakkasutta