Bhagavad Gita 9.14
Always extolling Me, they are strenuous and firm in their vows, prostrating themselves before Me, and worshiping Me continually with concentrated devotion.
सततं कीर्तयन्तो मां यतन्तश्च दृढव्रताः।
नमस्यन्तश्च मां भक्त्या नित्ययुक्ता उपासते॥satataṃ kīrtayanto māṃ yatantaśca dṛḍhavratāḥ|
namasyantaśca māṃ bhaktyā nityayuktā upāsate||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).