The Quran is the primary source of religious law in Islam. It is believed to be the direct word of God as revealed to the Prophet Muhammad.

The Ijma is the consensus of Muslim scholars on a particular issue. It is considered to be a reliable source of religious law, although it is not as authoritative as the Quran and the Sunnah.

The Sunnah is the term for the sayings and actions of the Prophet Muhammad. It is considered to be a reliable source of religious law, although it is not as authoritative as the Quran.

The Hadith is the term for the reports of the sayings and actions of the Prophet Muhammad. These reports are considered to be a reliable source of religious law, although they are not as authoritative as the Quran and the Sunnah.

The Ijtihad is the term for the process of interpreting religious law. This process is carried out by Muslim scholars who are experts in Islamic law.

The Hanafi school is the school of thought in Islamic law that is based on the teachings of Abu Hanifa. This school is followed by a majority of Muslims in the world.

The Maliki school is the school of thought in Islamic law that is based on the teachings of Malik ibn Anas. This school is followed by a significant number of Muslims in North Africa and West Africa.

The Shafi'i school is the school of thought in Islamic law that is based on the teachings of Muhammad ibn Idris ash-Shafi'i. This school is followed by a significant number of Muslims in Southeast Asia and East Africa.

The Hanbali school is the school of thought in Islamic law that is based on the teachings of Ahmad ibn Hanbal. This school is followed by a significant number of Muslims in Saudi Arabia and Qatar.

Halakha is the term for the legal system that is based on the teachings of Judaism. This system is derived from the Torah, the Talmud, and other Jewish religious texts.

Canon law is the term for the legal system that is based on the teachings of Christianity. This system is derived from the Bible, the writings of the Church Fathers, and other Christian religious texts.

Dharma is the term for the legal system that is based on the teachings of Hinduism. This system is derived from the Vedas, the Upanishads, and other Hindu religious texts.

Dharma is the term for the legal system that is based on the teachings of Buddhism. This system is derived from the Tripitaka, the Pali Canon, and other Buddhist religious texts.

Rehat Maryada is the term for the legal system that is based on the teachings of Sikhism. This system is derived from the Guru Granth Sahib, the Dasam Granth, and other Sikh religious texts.

Jain law is the term for the legal system that is based on the teachings of Jainism. This system is derived from the Jain Agamas, the Jain Sutras, and other Jain religious texts.