Saurapurana 52.34

52.34

pādakṛcchraṃ careddhatvā kṛcchramaśvavadhe smṛtam
taptakṛcchraṃ haritavadhe pārākaṃ govadhe smṛtam

the new moon of Phālguna, and likewise the eleventh of Pauṣa; / the tenth of Āṣāḍha also, the seventh of the month of Māgha;