Śrīmad-Bhāgavatam · Text 10.47.32
Who is speaking and story frame
येनेन्द्रियार्थान् ध्यायेत मृषा स्वप्नवदुत्थित: ।
तन्निरुन्ध्यादिन्द्रियाणि विनिद्र: प्रत्यपद्यत ॥ ३२ ॥
yenendriyārthān dhyāyeta
mṛṣā svapna-vad utthitaḥ
tan nirundhyād indriyāṇi
vinidraḥ pratyapadyata
As a person just arisen from sleep may continue to meditate on a dream even though it is illusory, so by the agency of the mind one meditates on the sense objects, which the senses can then obtain. Therefore one should become fully alert and bring the mind under control.
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.