These Levitical singers are supposed to have authored or transmitted Psalms 42, 44–49, 84–85, 87–88. Archaeological evidence of their existence comes from an eighth-century ostracon from Arad mentioning “Korah’s sons”; see Yohanan Aharoni, Arad Inscriptions (Jerusalem: Israel Exploration Society, 1981), text 49.2, pp. 180–182.