Dried beans need to soak in plenty of water for at least 8 hours before cooking. However, there is a quick-soaking method you can use in a pinch. It goes like this:
Put rinsed and sorted beans in a pot and cover with cold water by at least 8 cm / 3 inches. Cover the pot and bring to a boil. Once boiling, remove the pot from the heat and leave the beans in the hot liquid, covered, for 1 hour. The beans are now ready to be cooked according to your chosen recipe.