Then Zipporah took a flint knife, cut off her son’s foreskin, and touched Moses’ feet with it. She said, “You are a bridegroom of blood to me!”

At that time Yahweh spoke to Joshua, “Make flint knives, and circumcise the men of Israel.”

So Joshua made flint knives and circumcised the men of Israel at the Hill of Circumcision.

“Humans exert their power on the flinty rocks and overturn mountains at their base.

He turns a rock into a pool filled with water and turns flint into a spring flowing with water.

Their arrows are sharpened; all their bows are ready to shoot. Their horses’ hoofs are as hard as flint. Their chariot wheels are as quick as the wind.

Adonay Yahweh helps me. That is why I will not be ashamed. I have set my face like a flint. I know that I will not be put to shame.

They made their hearts as hard as flint so that they couldn’t hear the Lord’s teachings, the words that Yahweh Tsebaoth had sent by his Ruach through the earlier prophets. So Yahweh Tsebaoth became very angry.