'Living God' in the Bible

David spoke to the men who stood by him, saying, "What shall be done to the man who kills this Philistine, and takes away the reproach from Israel? For who is this uncircumcised Philistine, that he should defy the armies of the living God?"

Your servant struck both the lion and the bear, and this uncircumcised Philistine shall be as one of them [Should I not go and smite him, and remove this day a reproach from Israel? For who is this uncircumcised one], since he has defied the armies of the living God?"