In Hebrew, this expression can simply mean that Jehovah did not bring about the calamity he stated that he was inclined to bring upon the whole nation. Jehovah’s Dealings With Abraham
وَبِٱلْعِبْرَانِيَّةِ ،‏ تَحْمِلُ هذِهِ ٱلْكَلِمَةُ ٱلْفِكْرَةَ أَنَّ يَهْوَهَ لَمْ يُنْزِلِ ٱلْبَلِيَّةَ ٱلَّتِي قَالَ إِنَّهُ مَيَّالٌ إِلَى إِنْزَالِهَا بِٱلْأُمَّةِ كُلِّهَا .‏