Bhagavad Gita, Chapter 6, Verse 12

तत्रैकाग्रं मनः कृत्वा यतचित्तेन्द्रियक्रियः । उपविश्यासने युञ्ज्याद्योगमात्मविशुद्धये

tatraikāgraṃ manaḥ kṛtvā yatacittendriyakriyaḥ | upaviśyāsane yuñjyādyogamātmaviśuddhaye

Translation

Making the mind one-pointed, with the actions of the mind and the senses controlled, let him, seated there on the seat, practise Yoga for the purification of the self.

— Alladi Mahadeva Sastri

Word meanings

tatra
there
ekāgram
one-pointed (concentrated)
manaḥ
mind
kṛtvā
having made
yatacittendriyakriyaḥ
controlled, of mind, and, of senses, the actions, whose, he
upaviśya
being seated
āsane
on a seat
yuñjyāt
let him practise
yogam
yoga
ātmaviśuddhaye
of the self, for the purification

Śaṅkarācārya's commentary

He should withdraw the mind from all sense-objects before concentrating it. The self: the antaḥ-karaṇa, the inner sense, the mind.