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

Deuteronomy 8:15
Who led thee through that great and terrible wilderness, wherein were fiery serpents, and scorpions, and drought, where there was no water; who brought thee forth water out of the rock of flint;

Psalms 114:8
Which turned the rock into a standing water, the flint into a fountain of waters.

Isaiah 5:28
Whose arrows are sharp, and all their bows bent, their horses' hoofs shall be counted like flint, and their wheels like a whirlwind:

Isaiah 50:7
For the Lord GOD will help me; therefore shall I not be confounded: therefore have I set my face like a flint, and I know that I shall not be ashamed.

Ezekiel 3:9
As an adamant harder than flint have I made thy forehead: fear them not, neither be dismayed at their looks, though they be a rebellious house.