One verse

Bhagavad Gita 2.58

2.58

यदा संहरते चायं कूर्मोऽङ्गानीव सर्वशः | इन्द्रियाणीन्द्रियार्थेभ्यस्तस्य प्रज्ञा प्रतिष्ठिता ||२-५८||

yadā saṃharate cāyaṃ kūrmo.aṅgānīva sarvaśaḥ . indriyāṇīndriyārthebhyastasya prajñā pratiṣṭhitā ||2-58||

yadā
when
saṁharate
winds up
ca
also
ayam
he
kūrmaḥ
tortoise
aṅgāni
limbs
iva
like
sarvaśaḥ
altogether
indriyāṇi
senses
indriya-arthebhyaḥ
from the sense objects
tasya
his
prajñā
consciousness
pratiṣṭhitā
fixed

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.