Éxodo 7:10

Vinieron, pues, Moisés y Aarón á Faraón, é hicieron como Jehová lo había mandado: y echó Aarón su vara delante de Faraón y de sus siervos, y tornóse culebra.

¶ And Moses and Aaron went in unto Pharaoh, and they did so as the LORD had commanded: and Aaron cast down his rod before Pharaoh, and before his servants, and it became a serpent.