Śrīmad-Bhāgavatam · Text 10.58.45
Who is speaking and story frame
एवं समयमाकर्ण्य बद्ध्वा परिकरं प्रभु: ।
आत्मानं सप्तधा कृत्वा न्यगृह्णाल्लीलयैव तान् ॥ ४५ ॥
evaṁ samayam ākarṇya
baddhvā parikaraṁ prabhuḥ
ātmānaṁ saptadhā kṛtvā
nyagṛhṇāl līlayaiva tān
Upon hearing these terms, the Lord tightened His clothing, expanded Himself into seven forms and easily subdued the bulls.
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.