Those who are devoted to the cause of the Personality of Godhead live only for the welfare, development and happiness of others. They do not live for any selfish interest. So even though the Emperor [Parīkṣit] was free from all attachment to worldly possessions, how could he give up his mortal body, which was the shelter for others?
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
शिवाय लोकस्य भवाय भूतये य उत्तमश्लोकपरायणा जनाः । जीवन्ति नात्मार्थमसौ पराश्रयं मुमोच निर्विद्य कुतः कलेवरम्
śivāya lokasya bhavāya bhūtaye ya uttamaślokaparāyaṇā janāḥ | jīvanti nātmārthamasau parāśrayaṃ mumoca nirvidya kutaḥ kalevaram
SB 1.4.12