Śrīmad-Bhāgavatam · Text 11.26.23
Who is speaking and story frame
अदृष्टादश्रुताद् भावान्न भाव उपजायते ।
असम्प्रयुञ्जत: प्राणान् शाम्यति स्तिमितं मन: ॥ २३ ॥
adṛṣṭād aśrutād bhāvān
na bhāva upajāyate
asamprayuñjataḥ prāṇān
śāmyati stimitaṁ manaḥ
Because the mind is not disturbed by that which is neither seen nor heard, the mind of a person who restricts the material senses will automatically be checked in its material activities and become pacified.
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.