Generally, you need to soak dried beans in water for a few hours or overnight before they're ready to cook. (bonappetit.com)
You soak the dried beans in water overnight (I don't know why I was so afraid of this simple step) and pulse together with the rest of the ingredients. (littleferrarokitchen.com)
It's the liquid that you get from cooking or storing beans in water. (plateofplants.com)