Shiva Purana
अथ तस्यैवमनिशन्तत्परस्य द्विजस्त वै ॥ दिव्यम्वर्षसहस्रं तु गतं क्षणमिवाद्भुतम् ॥ १९॥
As the brahmin was engrossed in penance day and night, a thousand divine years elapsed like a moment.
english translation
atha tasyaivamanizantatparasya dvijasta vai ॥ divyamvarSasahasraM tu gataM kSaNamivAdbhutam ॥ 19॥
hk transliteration by Sanscript