ब्रह्मार्पणं ब्रह्महविर्ब्रह्माग्नौ ब्रह्मणा हुतम्। ब्रह्मैव तेन गन्तव्यं ब्रह्मकर्मसमाधिना
brahmārpaṇaṁ brahma havir brahmāgnau brahmaṇā hutam brahmaiva tena gantavyaṁ brahma-karma-samādhinā
For him, the sacrifice is the Spirit; the Spirit and the offering are one; it is the Spirit that is sacrificed in its own fire, and the man, even in action, is united with God, since his mind never ceases to be fixed on Him while performing the act.
Translated by Shri Purohit Swami
Brahman is the oblation; Brahman is the melted butter (ghee); by Brahman is the oblation poured into the fire of Brahman; Brahman indeed shall be attained by one who always sees Brahman in action.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
brahma—Brahman; arpaṇam—the ladle and other offerings; brahma—Brahman; haviḥ—the oblation; brahma—Brahman; agnau—in the sacrificial fire; brahmaṇā—by that person; hutam—offered; brahma—Brahman; eva—certainly; tena—by that; gantavyam—to be attained; brahma—Brahman; karma—offering; samādhinā—those completely absorbed in God-consciousness