Yadaa samharate chaayam - Selected Verses of Bhagavad Gita: Chapter 02, Verse 58

'Selected Verses of Bhagavad Gita' recounts only selected verses of The Gita, which Krishna has said as it is.

Bhagavad Gita: Chapter 02, Verse 58

English:

Yadaa samharate chaayam kurmo’ngaaneeva sarvashah
Indriyaaneendriyaarthebhyas tasya prajnyaa pratishthitaa

Sanskrit: 

यदा संहरते चायं कुर्मोङ्गानीव सर्वश: 
इंद्रियाणीन्द्रियार्थेभ्यस् तस्य प्रज्ञा प्रतिष्ठिता

Oriya: 

ଯଦା ସଂହରତେ ଚାୟଂ କୁର୍ମୋଙ୍ଗାନୀବ ସର୍ବଶଃ
ଇନ୍ଦ୍ରିୟାଣୀନ୍ଦ୍ରିୟାର୍ଥେଭ୍ୟସ୍ ତସ୍ୟ ପ୍ରଜ୍ଞା ପ୍ରତିଷ୍ଠିତା

Selected word meaning:
yadaa - when, samharate - withdraws, cha - also, ayam - all these, kurmah - tortoise, angaani - limbs, iva - like, sarvashah - completely, indriyaani - senses, indriya arthebhyah - from the sense objects, tasya - his, prajnyaa - perfect knowledge, pratisthita - is established

Translation:
When one completely withdraws his senses from the sense objects, like the tortoise withdraws its limbs from all sides, then he is established in perfect knowledge

Sources:
Sermons of Gita in Mahavarat by Sri B. R. Chopra
Sermons of Gita in Sri Krishna by Sri Ramanand Sagar
Bhagavad Gita by Sri Swami Sivananda of Divine Life Society
Bhagavad Gita As it Is by Sri Swami Prabhupada of ISKCON