Manusmriti

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सर्वं परवशं दुःखं सर्वमात्मवशं सुखम् । एतद् विद्यात् समासेन लक्षणं सुखदुःखयोः ॥ १६० ॥

sanskrit

Everything that depends on others (gives) pain, everything that depends on oneself (gives) pleasure; know that this is the short definition of pleasure and pain.

english translation

sarvaM paravazaM duHkhaM sarvamAtmavazaM sukham | etad vidyAt samAsena lakSaNaM sukhaduHkhayoH || 160 ||

hk transliteration by Sanscript