अग्निना प्रजया राजा लोकं गान्धर्वमेयिवान् ॥ ४९ ॥
trayī tretā-mukhe nṛpa
agninā prajayā rājā
lokaṁ gāndharvam eyivān
purūravasaḥ — from King Purūravā; eva — thus; āsīt — there was; trayī — the Vedic principles of karma, jñāna and upāsanā; tretā-mukhe — in the beginning of the Tretā-yuga; nṛpa — O King Parīkṣit; agninā — simply by generating the fire of sacrifice; prajayā — by his son; rājā — King Purūravā; lokam — to the planet; gāndharvam — of the Gandharvas; eyivān — achieved.
O Mahārāja Parīkṣit, at the beginning of Tretā-yuga, King Purūravā inaugurated a karma-kāṇḍa sacrifice. Thus Purūravā, who considered the yajñic fire his son, was able to go to Gandharvaloka as he desired.
In Satya-yuga, Lord Nārāyaṇa was worshiped by meditation (kṛte yad dhyāyato viṣṇum). Indeed, everyone always meditated upon Lord Viṣṇu, Nārāyaṇa, and achieved every success by this process of meditation. In the next yuga, Tretā-yuga, the performance of yajña began (tretāyāṁ yajato mukhaiḥ). Therefore this verse says, trayī tretā-mukhe. Ritualistic ceremonies are generally called fruitive activities. Śrīla Viśvanātha Cakravartī Ṭhākura says that in Tretā-yuga, beginning in the Svāyambhuva-manvantara, ritualistic fruitive activities were similarly manifested from Priyavrata, etc.
Thus end the Bhaktivedanta purports of the Ninth Canto, Fourteenth Chapter, of the Śrīmad-Bhāgavatam, entitled “King Purūravā Enchanted by Urvaśī.”