Mbh 1.3.38

“The Brahmana Rishi Utanka having saluted the chief serpents in this manner, obtained not, however, the ear-rings. And he thereupon became very thoughtful. And when he saw that he obtained not the ear-rings even though he had adored the serpents, he then looked about him and beheld two women at a loom weaving a piece of cloth with a fine shuttle; and in the loom were black and white threads. And he likewise saw a wheel, with twelve spokes, turned by six boys. And he also saw a man with a handsome horse. And he began to address them the following mantras: