Translations
He would have destroyed them — but Moses, His chosen servant, stood in the gap before Him, holding back the flood of His wrath from sweeping them away.
So He spoke of destroying them — but Mosheh, His chosen one, stood in the breach before Him to turn His wrath away from destruction.
Therefore he said that he would destroy them, had not Moses his chosen stood before him in the breach, to turn away his wrath, lest he should destroy them.
So He said He would destroy them—had not Moses His chosen one stood before Him in the breach to divert His wrath from destroying them.

