Bhagavad Gita · 12.20

ये तु धर्म्यामृतमिदं यथोक्तं पर्युपासते।श्रद्दधाना मत्परमा भक्तास्तेऽतीव मे प्रियाः॥

ye tu dharmyāmṛtam idaṁ yathoktaṁ paryupāsate śhraddadhānā mat-paramā bhaktās te 'tīva me priyāḥ

Those who follow this nectar of dharma as declared by me, with faith, regarding me as supreme — such devotees are exceedingly dear to me.

— Bhagavad Gita 12.20

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)