Bhagavad-gītā 2.58
BG 2.58
Open the full passageयदा संहरते चायं कूर्मोऽङ्गानीव सर्वशः । इन्द्रियाणीन्द्रियार्थेभ्यस्तस्य प्रज्ञा प्रतिष्ठिता ॥५८॥
Sanskrit
yadā saṁharate cāyaṁ kūrmo 'ṅgānīva sarvaśaḥ indriyāṇīndriyārthebhyas tasya prajñā pratiṣṭhitā
Translation
One who is able to withdraw his senses from sense objects, as the tortoise draws its limbs within the shell, is firmly fixed in perfect consciousness.