yadā saṁharate cāyaṁ
kūrmo ’ṅgānīva sarvaśaḥ
tasya prajñā pratiṣṭhitā
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.
. . .
यदा संहरते चायं कूर्मोऽङ्गानीव सर्वशः ।
इन्द्रियाणीन्द्रियार्थेभ्यस्तस्य प्रज्ञा प्रतिष्ठिता ॥ ५८ ॥