Therefore, while in material existence [bhavam āśritaḥ], a person fully competent to distinguish wrong from right must endeavor to achieve the highest goal of life as long as the body is stout and strong and is not embarrassed by dwindling.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
ततो यतेत कुशलः क्षेमाय भयमाश्रितः । शरीरं पौरुषं यावन्न विपद्येत पुष्कलम्
tato yateta kuśalaḥ kṣemāya bhayamāśritaḥ | śarīraṃ pauruṣaṃ yāvanna vipadyeta puṣkalam
SB 7.6.5