Bhagavad Gita · 3.15

कर्म ब्रह्मोद्भवं विद्धि ब्रह्माक्षरसमुद्भवम्।तस्मात्सर्वगतं ब्रह्म नित्यं यज्ञे प्रतिष्ठितम्॥

karma brahmodbhavaṁ viddhi brahmākṣhara-samudbhavam tasmāt sarva-gataṁ brahma nityaṁ yajñe pratiṣhṭhitam

Know that prescribed action originates from the Vedas, and the Vedas originate from the Imperishable. Therefore, the all-pervading Brahman is eternally established in sacrifice.

— Bhagavad Gita 3.15

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