Pre-heat oven to 400° F. Grease cast iron skillet or Dutch oven with butter or line a baking sheet or parchment paper.
In a large bowl, mix together flour, salt, and baking soda well, then mix in the raisins and caraway seeds.
Once ready to bake and oven is pre-heated, make a well with the flour mixture in the bowl and then add buttermilk. With a large spoon, gently mix into a shaggy dough.
Gently form into a ball in the bowl, doing so by kneading dough together as little as possible until a shaggy ball just barely comes together. All of the flour may not be incorporated, and that's ok.
Add balled dough to greased cast iron, Dutch oven, or baking sheet. Score a 1/3 inch deep X into the center of the dough. Spray top of loaf with a couple of squirts of water.
Bake for 40-45 minutes until golden brown or it reaches an internal temperature of 200° F.
Let cool for at least 30 minutes until slicing.