Laban

The term Leben, variously laban, liben, lben // ⓘ in the Middle East and North Africa, refers to a food or beverage of fermented milk. Generally, there are two main products known as leben: The yogurt variant for the Levant region and the buttermilk variant for parts of Arabia and North Africa (Maghreb). Leben can be served at breakfast, lunch, or dinner. Leben as a drink is traditionally prepared by letting milk ferment for around 24 hours, then churning and removing the butter. The remaining buttermilk can keep for several days at room temperature. In modern times, it is produced industrially. Leben in parts of the Middle East is traditionally prepared by boiling milk, usually whole milk, then adding yogurt (or previously made, left over/store-bought leben), and then cooled overnight.

Source: Wikipedia