John Gill

And the serpent said unto the woman,.... In reply to her answer: ye shall not surely die; in direct contradiction to the divine threatening, and which he would insinuate was a mere threatening, and which God never intended to put in execution; so that they had nothing to fear from that, God would never be so rigid and severe, and beat so hard upon them as to put them to death for such an offence, if it was one; he only gave out the menace to frighten them, and deter from it: however, at most it was not a certain thing they should die, and they might safely conclude they would not.