John Chrysostom
All of this transpired to ensure the fulfillment of God's promise to the patriarch. A short while prior, it had been declared to him that he would have a son, Isaac, and the appointed time was imminent, so that God’s promise would not be defiled in any manner. Therefore, God instilled in Abimelech a fear so profound that he was in awe and refrained from touching Sarah. This is why the sacred text remarks, 'But Abimelech touched her not.' Nevertheless, the king sought to defend his actions, questioning, 'O Lord, will You also wipe out an innocent nation?' He asked, 'Have I committed this act, knowing she is a wife? Did I intend to wrong a traveler? Was it my intention to take her as his wife? I believed I was honoring both her and him by considering her as his sister. So, will you also bring ruin upon innocent people?' He implied that he acted with a clear conscience, believing himself to be just.