'Uncircumcised' in the Bible

Jonathan said to the attendant who carried his weapons, “Come on, let’s cross over to the garrison of these uncircumcised men. Perhaps the Lord will help us. Nothing can keep the Lord from saving, whether by many or by few.”

David spoke to the men who were standing with him: “What will be done for the man who kills that Philistine and removes this disgrace from Israel? Just who is this uncircumcised Philistine that he should defy the armies of the living God?”

Your servant has killed lions and bears; this uncircumcised Philistine will be like one of them, for he has defied the armies of the living God.”

Then Saul said to his armor-bearer, “Draw your sword and run me through with it, or these uncircumcised men will come and run me through and torture me.” But his armor-bearer would not do it because he was terrified. Then Saul took his sword and fell on it.