Esther 8:10

Riders on mules, camels and young dromedaries - Most moderns translate “riders upon coursers and mules, the offspring of mares;” but the words translated “mules” and “mares,” are of very doubtful signification, since they scarcely occur elsewhere. The real meaning of the clause must remain doubtful; perhaps the true translation is, “riders upon coursers of the king’s stud, offspring of high-bred steeds.” So Esther 8:14.