Place raisins in big mixing bowl. Sprinkle baking soda over raisins. Boil water, and pour water over baking soda. Stir if needed until baking soda is dissolved.
Let sit overnight, or 6 to 8 hours.
Then add flour, sugar, salt, oil, and stir.
Bake in 3 small metal coffee cans (12 - 16 oz) or 2 standard size loaf pans, well greased & floured. Pam / cooking spray works, but crisco & flour results in a better "crust" to the bread.
Bake at 350 degrees for 1 - 2 hours. Baking time varies depending on how light or dark the pans are, and whether you are using clear glass or dark metal. Start checking at 1 hour. Bread is done when a skewer poked through the bread comes out clear.