Both by rising and by setting, the sun decreases the duration of life of everyone, except one who utilizes the time by discussing topics of the all-good Personality of Godhead.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
आयुर्हरति वै पुंसामुद्यन्नस्तं च यन्नसौ । तस्यर्ते यत्क्षणो नीत उत्तमश्लोकवार्तया
āyurharati vai puṃsāmudyannastaṃ ca yannasau | tasyarte yatkṣaṇo nīta uttamaślokavārtayā
SB 2.3.17