Choose the correct indirect speech: 'By God, I will not do this,' he said.

1. ক
   He swore by God that he would not do that.
   
2. খ
   He said by God that he would not do that.
   
3. গ
   He requested by God that he would not do that.
   
4. ঘ
   He swore that he would not do that by God.