'Circumcision' in the Bible

Then his father and mother said to him, Is there no woman among the daughters of your relations or among all my people, that you have to go for your wife to the Philistines, who are without circumcision? But Samson said to his father, Get her for me, for she is pleasing to me.

After this, he was in great need of water, and crying out to the Lord, he said, You have given this great salvation by the hand of your servant, and now need of water will be my death; and I will be given into the hands of this people who are without circumcision.