Shrimad Bhagavad Gita
प्रसादे सर्वदुःखानां हानिरस्योपजायते । प्रसन्नचेतसो ह्याशु बुद्धिः पर्यवतिष्ठते ॥ २-६५ ॥
In that serenity there is loss of all sorrow; for in the case of the person with a serene mind, the Buddhi (mind) soon becomes well established.
english translation
प्रसन्नता के प्राप्त होनेपर साधकके सम्पूर्ण दुःखोंका नाश हो जाता है और ऐसे शुद्ध चित्तवाले साधककी बुद्धि निःसन्देह बहुत जल्दी परमात्मामें स्थिर हो जाती है।
hindi translation
prasAde sarvaduHkhAnAM hAnirasyopajAyate । prasannacetaso hyAzu buddhiH paryavatiSThate ॥ 2-65 ॥
hk transliteration by Sanscript