कर्म ब्रह्मोद्भवं विद्धि ब्रह्माक्षरसमुद्भवम्।
तस्मात्सर्वगतं ब्रह्म नित्यं यज्ञे प्रतिष्ठितम्।।3.15।।
3.15 Know that actin has the veda as its origin; the Vedas has the Immutable as its source. Hence, the all-pervading Veda is for ever based on sacrifice.
3.15 Here ther term, Brahman connotes the physical body consisting of modifications of the Prakrti; for the Prakrti is denoted here by the term Brahman, as in the scriptural text: From Him arises, this Brahman and this Brahman becomes name, form and food (Mun. U., 1.1.9). Here also it will be said by Sri Krsna: This great Brahman is my womb (14.3). Therefore, the words that Activity springs from Brahman teaches that activity is produced by the physical body which is of the nature of the modification of Prakrti. The Brahman arises from the imperishable self. Here the term, imperishable, indicates the individual self. The physical body, which is inhabited by the self who is satisfied by food and drink, is fit for action; hence the physical body which constitutes the instrument of activity is said to be from the imperishable. Therefore the all-pervading Brahman means here the bodies of all persons of diverse kinds which are the products of Prakrti which comprises all material entities, and is hence all-pervading. They, the bodies, are established in sacrifice. The meanig is that the bodies have roots in sacrifice.
Karma brahmodbhavam viddhi brahmaakshara samudbhavam; Tasmaat sarvagatam brahma nityam yajne pratishthitam.
karma—duties; brahma—in the Vedas; udbhavam—manifested; viddhi—you should know; brahma—The Vedas; akṣhara—from the Imperishable (God); samudbhavam—directly manifested; tasmāt—therefore; sarva-gatam—all-pervading; brahma—The Lord; nityam—eternally; yajñe—in sacrifice; pratiṣhṭhitam—established