SB 4.23.13

According to a Bengali proverb, whatever spiritual progress one makes in life will be tested at the time of death. In Bhagavad-gita it is also confirmed: yam yam vapi smaran bhavam tyajaty ante kalevaram/ tam tam evaiti kaunteya sada tad-bhava-bhavitaḥ (Bg. 8.6). Those who are practicing Krsna consciousness know that their examination will be held at the time of death. If one can remember Krsna at death, he is immediately transferred to Goloka Vrndavana, or Krsnaloka, and thus his life becomes successful. Prthu Maharaja, by the grace of Krsna, could understand that the end of his life was near, and thus he became very jubilant and proceeded to completely give up his body on the brahma-bhūta stage by practicing the yogic process. It is thoroughly described in the following verses how one can voluntarily give up this body and return home, back to Godhead. The yogic process practiced by Prthu Maharaja at the time of death accelerates the giving up of this body while one is in sound health physically and mentally. Every devotee desires to give up the body while it is sound physically and mentally. This desire was also expressed by King Kulasekhara in his Mukunda-mala-stotra :