Bhagavad Gita 9.16

अहं क्रतुरहं यज्ञः स्वधाऽहमहमौषधम्।मंत्रोऽहमहमेवाज्यमहमग्निरहं हुतम्॥

ahaṃ kraturahaṃ yajñaḥ svadhā'hamahamauṣadham |maṃtro'hamahamevājyamahamagnirahaṃ hutam ||

I am Kratu; I am Yajna; I am the offering to the manes; I am the medicinal herbs and all plants; I am the Mantra; I am also the ghee or melted butter; I am the fire; I am the oblation.

I am the oblation, the sacrifice, and the worship; I am the fuel and the chant; I am the butter offered to the fire; I am the fire itself, and I am the act of offering.

Our plain-language meaning of this verse is waiting for scholar review.