Śrīmad-Bhāgavatam · Text 12.3.49
Who is speaking and story frame
तस्मात् सर्वात्मना राजन् हृदिस्थं कुरु केशवम् ।
म्रियमाणो ह्यवहितस्ततो यासि परां गतिम् ॥ ४९ ॥
tasmāt sarvātmanā rājan
hṛdi-sthaṁ kuru keśavam
mriyamāṇo hy avahitas
tato yāsi parāṁ gatim
Therefore, O King, endeavor with all your might to fix the Supreme Lord Keśava within your heart. Maintain this concentration upon the Lord, and at the time of death you will certainly attain the supreme destination.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.