Flint

“He led you through the vast and terrifying wilderness with its venomous snakes and scorpions, a thirsty and waterless land. He brought you water from the rock of flint.”

“He made him ride on the heights of the land and fed him the produce of the field. He nourished him with honey from the rock and oil from the flinty crag,”

“who turned the rock into a pool, the flint into a fountain of water!”

“Because the Lord GOD helps Me, I have not been disgraced; therefore I have set My face like flint, and I know that I will not be put to shame.”

“I will make your forehead like a diamond, harder than flint. Do not be afraid of them or dismayed at their presence, even though they are a rebellious house.””