Exodus 4:25
So Zipporah took a flint, cut off her son’s foreskin, and threw it at Moses’ feet.
Joshua 5:2-3
                            At that time the Lord said to Joshua, “Make flint knives and circumcise the Israelite men again.”
Genesis 17:14
If any male is not circumcised in the flesh of his foreskin, that man will be cut off from his people; he has broken My covenant.”
2 Samuel 16:7
Shimei said as he cursed: “Get out, get out, you worthless murderer!
Treasury of Scripture Knowledge
Summary
                            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.                        
                    A sharp stone
A bloody
Bible References
A sharp stone
                                        Joshua 5:2                                        
                                                            
                        At that time the Lord said to Joshua, “Make flint knives and circumcise the Israelite men again.”  
                                    A bloody
                                        2 Samuel 16:7                                        
                                                            
                        Shimei said as he cursed: “Get out, get out, you worthless murderer!