Shiva Purana
एवमब्दमितं कालन्तताप स तपोऽद्भुतम् ॥ त्रिकालमर्चयद्भक्त्या वीरेशं लिङ्गमुत्तमम् ॥ ३५ ॥
Thus far a full year he performed the wonderful penance. He worshipped the excellent Vīreśa thrice a day.
english translation
evamabdamitaM kAlantatApa sa tapo'dbhutam ॥ trikAlamarcayadbhaktyA vIrezaM liGgamuttamam ॥ 35 ॥
hk transliteration by Sanscript