Flint

Flint is the hardest, driest stone in the Bible, and the writers use it two ways. For Israel, God gave water “out of the rock of flint,” and the psalmist sings that he turned “the flint into a fountain of waters.” For his servants, flint is firmness. The prophet in Isaiah 50 says, “therefore have I set my face like a flint,” trusting God to help him, and Ezekiel is told his forehead has been made “harder than flint” for a rebellious people. In one stone: provision where there seems to be none, and courage for a hard errand.

5 verses

Deuteronomy

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;

Deuteronomy 32:13

He made him ride on the high places of the earth, that he might eat the increase of the fields; and he made him to suck honey out of the rock, and oil out of the flinty rock;

Psalms

Psalms 114:8

Which turned the rock into a standing water, the flint into a fountain of waters.

Isaiah

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

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.

From Easton's Bible Dictionary

Matthew George Easton, 1897

Abounds in all the plains and valleys of the wilderness of the forty years’ wanderings. In Isa. 50:7 and Ezek. 3:9 the expressions, where the word is used, means that the “Messiah would be firm and resolute amidst all contempt and scorn which he would meet; that he had made up his mind to endure it, and would not shrink from any kind or degree of suffering which would be necessary to accomplish the great work in which he was engaged.” (Comp. Ezek. 3:8, 9.) The words “like a flint” are used with reference to the hoofs of horses (Isa. 5:28).

From Smith's Bible Dictionary

William Smith, 1884

a well-known stone, a variety of quartz. It is extremely hard, and strikes fire. It was very abundant in and about Palestine.