Verses with the word riders in the Old Testament (5 verses):

2 Kings 18:23
Now therefore, I pray thee, give pledges to my lord the king of Assyria, and I will deliver thee two thousand horses, if thou be able on thy part to set riders upon them.

Esther 8:10
And he wrote in the king Ahasuerus' name, and sealed it with the king's ring, and sent letters by posts on horseback, and riders on mules, camels, and young dromedaries:

Isaiah 36:8
Now therefore give pledges, I pray thee, to my master the king of Assyria, and I will give thee two thousand horses, if thou be able on thy part to set riders upon them.

Haggai 2:22
And I will overthrow the throne of kingdoms, and I will destroy the strength of the kingdoms of the heathen; and I will overthrow the chariots, and those that ride in them; and the horses and their riders shall come down, every one by the sword of his brother.

Zechariah 10:5
And they shall be as mighty men, which tread down their enemies in the mire of the streets in the battle: and they shall fight, because the LORD is with them, and the riders on horses shall be confounded.