BG 12.9
अथ चित्तं समाधातुं न शक्नोषि मयि स्थिरम्।अभ्यासयोगेन ततो मामिच्छाप्तुं धनञ्जय
atha chittaṁ samādhātuṁ na śhaknoṣhi mayi sthiram abhyāsa-yogena tato mām ichchhāptuṁ dhanañjaya
But if you cannot fix your mind firmly on Me, then, my beloved friend, try to do so through constant practice.
Translated by Shri Purohit Swami
If you are unable to fix your mind steadily on Me, then seek to reach Me through the yoga of constant practice, O Arjuna.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
atha—if; chittam—mind; samādhātum—to fix; na śhaknoṣhi—(you) are unable; mayi—on me; sthiram—steadily; abhyāsa-yogena—by uniting with God through repeated practice; tataḥ—then; mām—me; ichchhā—desire; āptum—to attain; dhanañjaya—Arjun, the conqueror of wealth