Shiva Purana
स तत्र निवसन्नेव यदि धीरमना नरः ॥ प्राणान्विनापि रोगाद्यैः स्वयमेव परित्यजेत् ॥ ४८ ॥
If he has courage enough he shall abandon his life there voluntarily even without ailments.
english translation
sa tatra nivasanneva yadi dhIramanA naraH ॥ prANAnvinApi rogAdyaiH svayameva parityajet ॥ 48 ॥
hk transliteration by Sanscript