Śrīmad-Bhāgavatam · Text 12.2.30
Who is speaking and story frame
यावत् स पादपद्माभ्यां स्पृशनास्ते रमापति: ।
तावत् कलिर्वै पृथिवीं पराक्रन्तुं न चाशकत् ॥ ३० ॥
yāvat sa pāda-padmābhyāṁ
spṛśan āste ramā-patiḥ
tāvat kalir vai pṛthivīṁ
parākrantuṁ na cāśakat
As long as Lord Śrī Kṛṣṇa, the husband of the goddess of fortune, touched the earth with His lotus feet, Kali was powerless to subdue this planet.
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.