Śrīmad-Bhāgavatam · Text 11.12.11
Who is speaking and story frame
तास्ता: क्षपा: प्रेष्ठतमेन नीता
मयैव वृन्दावनगोचरेण ।
क्षणार्धवत्ता: पुनरङ्ग तासां
हीना मया कल्पसमा बभूवु: ॥ ११ ॥
tās tāḥ kṣapāḥ preṣṭhatamena nītā
mayaiva vṛndāvana-gocareṇa
kṣaṇārdha-vat tāḥ punar aṅga tāsāṁ
hīnā mayā kalpa-samā babhūvuḥ
Dear Uddhava, all of those nights that the gopīs spent with Me, their most dearly beloved, in the land of Vṛndāvana seemed to them to pass in less than a moment. Bereft of My association, however, the gopīs felt that those same nights dragged on forever, as if each night were equal to a day of Brahmā.
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.