Śrīmad-Bhāgavatam · Text 12.2.38
Who is speaking and story frame
ताविहैत्य कलेरन्ते वासुदेवानुशिक्षितौ ।
वर्णाश्रमयुतं धर्मं पूर्ववत् प्रथयिष्यत: ॥ ३८ ॥
tāv ihaitya kaler ante
vāsudevānuśikṣitau
varṇāśrama-yutaṁ dharmaṁ
pūrva-vat prathayiṣyataḥ
At the end of the Age of Kali, these two kings, having received instruction directly from the Supreme Personality of Godhead, Vāsudeva, will return to human society and reestablish the eternal religion of man, characterized by the divisions of varṇa and āśrama, just as it was before.
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.