My dear Uddhava, you should not remain here on the earth once I have abandoned this world. My dear devotee, you are sinless, but in Kali-yuga the people will be addicted to all types of sinful activities; therefore do not stay here.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
न वस्तव्यं त्वयैवेह मया त्यक्ते महीतले । जनोऽधर्मरुचिर्भद्र भविष्यति कलौ युगे
na vastavyaṃ tvayaiveha mayā tyakte mahītale | jano'dharmarucirbhadra bhaviṣyati kalau yuge
SB 11.7.5