योगी युञ्जीत सततमात्मानं रहसि स्थितः। एकाकी यतचित्तात्मा निराशीरपरिग्रहः
yogī yuñjīta satatam ātmānaṁ rahasi sthitaḥ ekākī yata-chittātmā nirāśhīr aparigrahaḥ
Let the student of spirituality try unceasingly to concentrate his mind; let him live in seclusion, absolutely alone, with his mind and personality controlled, free from desire and without possessions.
Translated by Shri Purohit Swami
Let the yogi constantly strive to keep the mind steady, remaining in solitude, alone, with the body and mind controlled, and free from hope and greed.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
yogī—a yogi; yuñjīta—should remain engaged in meditation; satatam—constantly; ātmānam—self; rahasi—in seclusion; sthitaḥ—remaining; ekākī—alone; yata-chitta-ātmā—with a controlled mind and body; nirāśhīḥ—free from desires; aparigrahaḥ—free from desires for possessions for enjoyment