'Uncircumcised' in the Bible

So Jonathan said to {his armor bearer}, "Come, let us go over to the garrisons of these uncircumcised; perhaps Yahweh will act for us, for there is no hindrance for Yahweh to save by many or by few."

Now David had spoken to the men [who were] standing with him, saying, "What will be done for the man who defeats this Philistine and removes [the] disgrace from Israel? For who [is] this uncircumcised Philistine that he defies the battle lines of the living God?"

Your servant has struck down both the lion and the bear, and this uncircumcised Philistine will be like one of them, because he defied the battle lines of the living God."

Then Saul said to {his armor bearer}, "Draw your sword and thrust me through with it, so that these uncircumcised do not come and thrust me through and make a fool of me!" But {his armor bearer} [was] not willing [to do so] because he [was] very afraid. So Saul took the sword and fell on it.