Shiva Purana
कार्तिक्यां कृतिकायोगे दद्याद्दीपसहस्रकम् ॥ मार्गशीर्षे तथार्द्रायां घृतेन स्नापयेच्छिवम् ॥ १२ ॥
In the month of Octo-November when the moon is in conjunction with the star Kṛttikā he shall light a thousand lamps. In the month of Nov-December on the Ārdrā star he shall perform the ablution of Śiva with ghee.
english translation
kArtikyAM kRtikAyoge dadyAddIpasahasrakam ॥ mArgazIrSe tathArdrAyAM ghRtena snApayecchivam ॥ 12 ॥
hk transliteration by Sanscript