BG 10.31-33
Of purifiers I am the wind; Rama of warriors I; and I am Makara of fishes; of streams the Gangâ am I. Of creations the beginning and the ending, and also the middle am I, O Arjuna. Of sciences the science concerning the Self; the speech of orators I. Of letters the letter A I am, and the duality of a compound; I also everlasting Time; I the Supporter, whose face turns everywhere.