Bhagavad Gita 11.48

न वेदयज्ञाध्ययनैर्न दानैर्न च क्रियाभिर्न तपोभिरुग्रैः।एवंरूपः शक्य अहं नृलोकेद्रष्टुं त्वदन्येन कुरुप्रवीर ॥११.४८॥

na vedayajñādhyayanairna dānairna ca kriyābhirna tapobhirugraiḥevaṃrūpaḥ śakya ahaṃ nṛlokedraṣṭuṃ tvadanyena kurupravīra

Neither by the study of the Vedas, nor by gifts, nor by sacrifices, nor by severe austerities, can I be seen in this form in the world of men by any other than yourself, O great hero of the Kurus (Arjuna).

गीता