Srimad BhagavadGita

From the śloka yadā saṃharate cāyaṃ... B.G 2.58, Kṛṣṇa started to instruct on keeping one’s senses under control. HE concludes these instructions with this śloka.

Kṛṣṇa says, "O mighty armed one! Therefore one whose senses are pulled back from their objects in all ways, his intelligence (knowledge about the soul) is firmly established."

tasmāt (Therefore) Since the mind which follows the senses, destroys the knowledge about the soul, therefore…

yasya indriyāṇīndriyārthebhyaḥ sarvaśaḥ nigṛhītāni, tasya prajñā pratiṣṭhitā (One whose senses are pulled back in all ways from their objects, his intelligence is firmly established) As described earlier, one whose mind is fixed on ME (the most auspicious refuge) and whose senses are thus pulled back completely from their objects like sounds, forms, etc, is firmly established in soul knowledge and has a continuous vision of the soul. 

sarvaśaḥ nigṛhītāni (Senses are pulled back completely) As told in the śloka raso’pyasya paraṃ

dṛṣṭvā nivartate B.G 2.59 (Complete control over the senses such that the attachment towards sense

objects is totally destroyed), the meaning here too is that the senses are completely under the control of

the mind and the attachment with sense objects is removed. As already told, this can be achieved only by

one who fixes his mind on the most auspicious refuge which is Bhagawān's divine auspicious form.

Mahābāho (One with mighty arms) Kṛṣṇa means the following when HE addresses Arjuna as Mahābāho, 'O Arjuna! Just as your visible body parts like arms, etc, are hailed for their greatness, shouldn’t your subtle senses also give up attachment towards sense objects and be hailed in a similar way?'