Ijma

Ijmāʿ (إجماع) is an Arabic term referring to the consensus or agreement of the Muslim scholars basically on religious issues. Various schools of thought within Islamic jurisprudence may define this consensus to be that of the first generation of Muslims only; or the consensus of the first three generations of Muslims; or the consensus of the jurists and scholars of the Muslim world, or scholarly consensus; or the consensus of all the Muslim world, both scholars and laymen.