Bhagavad Gita 3.15
All actions originate from the Supreme Spirit, which is Imperishable, and in sacrificial actions, the all-pervasive Spirit is consciously present.
कर्म ब्रह्मोद्भवं विद्धि ब्रह्माक्षरसमुद्भवम्।
तस्मात्सर्वगतं ब्रह्म नित्यं यज्ञे प्रतिष्ठितम्॥karma brahmodbhavaṃ viddhi brahmākṣarasamudbhavam|
tasmātsarvagataṃ brahma nityaṃ yajñe pratiṣṭhitam||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).