Bhagavatapurana 7.15.50

7.15.50

dravyasūkṣmavipākaśca dhūmo rātrirapakṣayaḥ /
ayanaṃ dakṣiṇaṃ somo darśa oṣadhivīrudhaḥ //

50. The subtle modification of substances thrown (into Agni) as offerings, the smoke, the night, the dark fortnight; Dakshinayana (the region of) Soma, Darsa, the plants and creepers;