Śrīmad-Bhāgavatam · Text 7.13.29
Who is speaking and story frame
जलं तदुद्भवैश्छन्नं हित्वाज्ञो जलकाम्यया ।
मृगतृष्णामुपाधावेत्तथान्यत्रार्थदृक् स्वत: ॥ २९ ॥
jalaṁ tad-udbhavaiś channaṁ
hitvājño jala-kāmyayā
mṛgatṛṣṇām upādhāvet
tathānyatrārtha-dṛk svataḥ
Just as a deer, because of ignorance, cannot see the water within a well covered by grass, but runs after water elsewhere, the living entity covered by the material body does not see the happiness within himself, but runs after happiness in the material world.
Read Śrīla Prabhupāda's purport on Vedabase.io