Immediately on the death of the gods the sun began his motion in the heavens; and a man called Tecuzistecatl, or Tezcociztecatl, who, when Nanahuatzin leaped into the fire, had retired into a cave, now emerged from his concealment as the moon. Others say that instead of going into a cave, this Tecuzistecatl, had leaped into the fire after Nanahuatzin, but that, the heat of the fire being somewhat abated, he had come out less brilliant than the sun. Still another variation is, that the sun and moon came out equally bright, but this not seeming good to the gods, one of them took a rabbit by the heels and slung it into the face of the moon, dimming its lustre with a blotch whose mark may be seen to this day.

After the gods had died in the way herein related, leaving their garments behind as relics, those servants went about everywhere, bearing these relics like bundles upon their shoulders, very sad and pensive and wondering if ever again they would see their departed gods. Now the name of one of these deceased deities was Tezcatlipoca, and his servant having arrived at the sea coast, was favored with an apparition of his master in three different shapes. And Tezcatlipoca spake to his servant saying: Come hither, thou that lovest me so well, that I may tell thee what thou hast to do. Go now to the House of the Sun and fetch thence singers and instruments so that thou mayest make me a festival; but first call upon the whale, and upon the siren, and upon the tortoise, and they shall make thee a bridge to the sun.

The Works of Hubert Howe Bancroft, Volume 3 — Part 47

Then was all this done; and the messenger went across the sea upon his living bridge, towards the House of the Sun, singing what he had to say. And the Sun heard the song, and he straitly charged his people and servants, saying: See now that ye make no response to this chant, for whoever replies to it must be taken away by the singer. But the song was so exceeding sweet that some of them could not but answer, and they were lured away, bearing with them the drum, _teponaztli_, and the kettle-drum, _vevetl_. Such was the origin of the festivals and the dances to the gods; and the songs sung during these dances they held as prayers, singing them always with great accuracy of intonation and time.

The Works of Hubert Howe Bancroft, Volume 3 — Part 47