Śrīmad-Bhāgavatam · Text 10.52.2
Who is speaking and story frame
संवीक्ष्य क्षुल्लकान् मर्त्यान् पशून्वीरुद्वनस्पतीन् ।
मत्वा कलियुगं प्राप्तं जगाम दिशमुत्तराम् ॥ २ ॥
saṁvīkṣya kṣullakān martyān
paśūn vīrud-vanaspatīn
matvā kali-yugaṁ prāptaṁ
jagāma diśam uttarām
Seeing that the size of all the human beings, animals, trees and plants was severely reduced, and thus realizing that the Age of Kali was at hand, Mucukunda left for the north.
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.