Śrīmad-Bhāgavatam · Text 11.15.10
Who is speaking and story frame
भूतसूक्ष्मात्मनि मयि तन्मात्रं धारयेन्मन: ।
अणिमानमवाप्नोति तन्मात्रोपासको मम ॥ १० ॥
bhūta-sūkṣmātmani mayi
tan-mātraṁ dhārayen manaḥ
aṇimānam avāpnoti
tan-mātropāsako mama
One who worships Me in My atomic form pervading all subtle elements, fixing his mind on that alone, obtains the mystic perfection called aṇimā.
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.