'Mules' in the Bible

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

Ahab said to Obadiah, "Go through the land, to all the springs of water, and to all the brooks. Perhaps we may find grass and save the horses and mules alive, that we not lose all the animals."