Inimical kings like Śiśupāla, Pauṇḍraka and Śālva were always thinking about Lord Kṛṣṇa. Even while they were lying down, sitting or engaging in other activities, they enviously meditated upon the bodily movements of the Lord, His sporting pastimes, His loving glances upon His devotees, and other attractive features displayed by the Lord. Being thus always absorbed in Kṛṣṇa, they achieved spiritual liberation in the Lord’s own abode. What then can be said of the benedictions offered to those who constantly fix their minds on Lord Kṛṣṇa in a favorable, loving mood?
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
वैरेण यं नृपतयः शिशुपालपौण्ड्र- शाल्वादयो गतिविलासविलोकनाद्यैः । ध्यायन्त आकृतधियः शयनासनादौ तत्साम्यमापुरनुरक्तधियां पुनः किम्
vaireṇa yaṃ nṛpatayaḥ śiśupālapauṇḍra- śālvādayo gativilāsavilokanādyaiḥ | dhyāyanta ākṛtadhiyaḥ śayanāsanādau tatsāmyamāpuranuraktadhiyāṃ punaḥ kim
SB 11.5.48