OT-HISTORY.filter - nkjv flint:

nkjv@Joshua:5:2 @ At that time the LORD said to Joshua, "Make flint knives for yourself, and circumcise the sons of Israel again the second time."

nkjv@Joshua:5:3 @ So Joshua made flint knives for himself, and circumcised the sons of Israel at the hill of the foreskins.

nkjv@Zechariah:7:12 @ Yes, they made their hearts like flint, refusing to hear the law and the words which the LORD of hosts had sent by His Spirit through the former prophets. Thus great wrath came from the LORD of hosts.