Shiva Purana
ईदृशं च तपः कृत्वा साध्यते फलमुत्तमम् ॥ शुभं फलं स्वयं हित्वा साध्यते नाहितं पुनः ॥ १६ ॥
Excellent results are sought after performing, penance. No harm is sought after voluntarily eschewing auspicious results.
english translation
IdRzaM ca tapaH kRtvA sAdhyate phalamuttamam ॥ zubhaM phalaM svayaM hitvA sAdhyate nAhitaM punaH ॥ 16 ॥
hk transliteration by Sanscript