Charles H. Spurgeon on Psalms 53:1

There is no God. ny'is properly a noun, and means nonentity, or nonexistence: "nothing of God, "or "no such thing as God." It cannot be explained as a wish —"No God!" i.e., O that there were no God! —because ny'in usage always includes the substantive verb, and denies the existence, or at least the presence, of the person or thing to which it is prefixed. This is also clear from the use of the same word in the last clause, where its sense is unambiguous. J. A. Alexander on Psalm XIV.