'Mules' in the Bible

And they brought every man his tribute, vessels of silver, and vessels of gold, and raiment, and armor, and spices, horses, and mules, a rate year by year.

And Ahab said unto Obadiah, Go through the land, unto all the fountains of water, and unto all the brooks: peradventure we may find grass and save the horses and mules alive, that we lose not all the beasts.