यदा विनियतं चित्तमात्मन्येवावतिष्ठते। निःस्पृहः सर्वकामेभ्यो युक्त इत्युच्यते तदा
yadā viniyataṁ chittam ātmanyevāvatiṣhṭhate niḥspṛihaḥ sarva-kāmebhyo yukta ityuchyate tadā
When the mind is completely controlled, centered in the Self, and free from all earthly desires, then the man is truly spiritual.
Translated by Shri Purohit Swami
When the perfectly controlled mind rests in the Self alone, free from longing for any of the objects of desire, then it is said, 'He is united'.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
yadā—when; viniyatam—fully controlled; chittam—the mind; ātmani—of the self; eva—certainly; avatiṣhṭhate—stays; nispṛihaḥ—free from cravings: sarva; kāmebhyaḥ—for yearning of the senses; yuktaḥ—situated in perfect Yog; iti—thus; uchyate—is said; tadā—then