Bhagavad Gita · 11.48

न वेदयज्ञाध्ययनैर्न दानै-र्न च क्रियाभिर्न तपोभिरुग्रैः।एवंरूपः शक्य अहं नृलोकेद्रष्टुं त्वदन्येन कुरुप्रवीर॥

na veda-yajñādhyayanair na dānair na cha kriyābhir na tapobhir ugraiḥ evaṁ-rūpaḥ śhakya ahaṁ nṛ-loke draṣhṭuṁ tvad-anyena kuru-pravīra

Not by the study of the Vedas, not by austerities, not by charity, not by rituals can I be seen in this form in the world of humans, O best of the Kuru warriors — by anyone other than you.

— Bhagavad Gita 11.48

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