NUM232 Levites shall not perform the tasks of the Kohanim, and Kohanim shall not perform the tasks of the Levites. The Kohanim and the Levites are privileged to perform prized and sacred tasks. Accordingly, their functions must be performed without any trace of laziness, forgetfulness, or despair of success. Without question, if a task is assigned to two or more people, instead of one, there is a greater chance that it will not be performed properly, if at all, for each person relies upon his partner. The result might be that the task is completely neglected.