शनैः शनैरुपरमेद् बुद्ध्या धृतिगृहीतया। आत्मसंस्थं मनः कृत्वा न किञ्चिदपि चिन्तयेत्
śhanaiḥ śhanair uparamed buddhyā dhṛiti-gṛihītayā ātma-sansthaṁ manaḥ kṛitvā na kiñchid api chintayet
Little by little, with the help of his reason controlled by fortitude, let him attain peace; and, fixing his mind on the Self, let him not think of anything else.
Translated by Shri Purohit Swami
Little by little, let him attain steadiness of the intellect by holding it firmly; having made the mind establish itself in the Self, let him not think of anything else.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
śhanaiḥ—gradually; śhanaiḥ—gradually; uparamet—attain peace; buddhyā—by intellect; dhṛiti-gṛihītayā—achieved through determination of resolve that is in accordance with scriptures; ātma-sanstham—fixed in God; manaḥ—mind; kṛitvā—having made; na—not; kiñchit—anything; api—even; chintayet—should think of