Verses with the word viol in the Old Testament (2 verses):

Isaiah 5:12
And the harp, and the viol, the tabret, and pipe, and wine, are in their feasts: but they regard not the work of the LORD, neither consider the operation of his hands.

Amos 6:5
That chant to the sound of the viol, and invent to themselves instruments of musick, like David;