B.G 9.16 and 17
ahaṁ kraturahaṁ yajñaḥ svadhā'hamahamauṣadham। mantro'hamahamevājyam ahamagnirahaṁ hutam ॥16॥
I am the ritual, I am the sacrifice, I am the offering to the ancestors, I am the medicinal herb; I am the mantra, I am the clarified butter, I am the fire, I am the act of offering.
pitā'hamasya jagato mātā dhātā pitāmahaḥ। vedyaṁ pavitramoṅkāra r̥k sāma yajureva ca ॥17॥
I am the father of this universe, the mother, the sustainer, and the grandfather; I am the object to be known, the purifier, the sacred syllable Om, and also the Rigveda, the Sāmaveda, and the Yajurveda.
Gīta Bhāshya 9.16 and 17
The lord declares the realized knowledge, that He is everything! 'kratus' - sacrificial rites like Agniṣṭoma. 'yajña' - offering of materials directed toward the gods.
pratijñātaṁ vijñānaṁ āha - ahaṁ kratuḥ ityādinā। kratavaḥ agniṣṭomādayaḥ। yajñaḥ devatāṁ uddiśya dravyaparityāgaḥ।
He declares the realized knowledge—'I am the ritual' and so on. The 'kratus' are sacrificial rites like Agniṣṭoma; 'yajña' is the offering of materials directed toward a deity.
"uddiśya devān dravyāṇāṁ tyāgo yajña itīritaḥ।"
"Sacrifice is said to be the offering of materials directed toward the gods.""
ityabhidhānāt ॥16-17॥
- thus declared (in the dictionary).
