Shiva Purana
सर्वांगव्याधयः पश्चात्सर्वानंदश्च लीयते । अभ्यासात्क्लेशमेतद्वै पश्चादाद्यंतमंगलम् २७ ।
All the ailments of the body are nullified and supreme bliss is realised. Painful indeed is the process but later on everything becomes auspicious from beginning to end.
english translation
sarvAMgavyAdhayaH pazcAtsarvAnaMdazca lIyate । abhyAsAtklezametadvai pazcAdAdyaMtamaMgalam 27 ।
hk transliteration by Sanscript