What is ijmā in Islamic law?

Ijmā is the Arabic term for "consensus of opinion" in Islamic law. It refers to the agreement of the Muslim community on a particular issue. Ijmā is considered one of the primary sources of Islamic law, along with the Qur'an, the Sunnah (the sayings and actions of the Prophet Muhammad), and qiyas (analogical reasoning). The concept of ijmā is used to establish legal rulings on matters where there is no clear guidance in the other sources of Islamic law. The consensus can be reached by scholars or the general public, and it is generally accepted as a strong evidence in Islamic jurisprudence.