'Living God' in the Bible

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

Your servant killed both the lion and the bear. And this uncircumcised Philistine shall be like one of them, since he has defied the armies of the living God.