What Is Flint in the Bible?
Object
A very hard stone with a sharp edge. Knives were made from it, and it was struck to make sparks for a fire.
Where it appears in the Bible
Exodus 4:25
What the Bible says
Exodus 4:25
Immediately Sephora took a very sharp stone, and circumcised the fore skin of her son, and touched his feet and said: A bloody spouse art thou to me.
Douay-Rheims Bible (Challoner revision), public domain.
Source: RAE, “pedernal”