Śrīmad-Bhāgavatam · Text 11.15.22
Who is speaking and story frame
यदा मन उपादाय यद् यद् रूपं बुभूषति ।
तत्तद् भवेन्मनोरूपं मद्योगबलमाश्रय: ॥ २२ ॥
yadā mana upādāya
yad yad rūpaṁ bubhūṣati
tat tad bhaven mano-rūpaṁ
mad-yoga-balam āśrayaḥ
When the yogī, applying his mind in a certain way, desires to assume a particular form, that very form immediately appears. Such perfection is possible by absorbing the mind in the shelter of My inconceivable mystic potency, by which I assume innumerable forms.
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.