B.G 7.17 and 7.18
तेषां ज्ञानी नित्ययुक्त एकभक्तिर्विशिष्यते। प्रियो हि ज्ञानिनोऽत्यर्थमहं स च मम प्रियः ॥१७॥
उदाराः सर्व एवैते ज्ञानी त्वात्मैव मे मतम्। आस्थितः स हि युक्तात्मा मामेवानुत्तमां गतिम् ॥१८॥
All these are indeed noble, but among them, the Wise One (jñānī), who is ever steadfast and has single-pointed devotion, excels. Such a wise person is considered by Me as My very essence. I am exceedingly dear to him, and he is also dear to Me. Such a wise one is steadfastly situated in Me, is firmly established, and attains Me alone as the supreme and unsurpassed goal.
Gīta Bhāshya 7.17 and 18
ekabhakti, i.e. Single-pointed devotion - Devotion exclusively in the Lord and not elsewhere.
एकस्मिन्नेव भक्तिः इति एकभक्तिः। तच्चोक्तं गारुडे -
Devotion fixed on one alone is called 'ekabhakti' (single-pointed devotion). The Garuḍa Purāṇa also makes the following statement:
"मय्येव भक्तिर्नान्यत्र एकभक्तिः स उच्यते।"
"Devotion exclusively in Me and not elsewhere is called ekabhakti (single-pointed devotion)."
इति॥१७॥
-stated thus.