Strong’s Hebrew
H6864 — tsor
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
צֹר
tsor — pronounced tsore
from 6696; a stone (as if pressed hard or to a point); (by implication, of use) a knife:--flint, sharp stone. see H06696
2 occurrences in the KJV.
Exodus 4:25
Then Zipporah took a sharp stone, and cut off the foreskin of her son, and cast it at his feet, and said, Surely a bloody husband art thou to me.
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.