The Constitution of India is the supreme law of the land and is the primary source of all other laws.

Judicial decisions, legal texts, and customary law are all secondary sources of Indian law.

The Vedas, Upanishads, and Smritis are all sources of Hindu law.

The Quran, Sunnah, and Hadith are all sources of Muslim law.

Local customs and usages are the primary source of customary law.

Treaties and conventions, customary international law, and general principles of law are all sources of international law.

The Constitution of India, the Environment Protection Act, 1986, and the Water (Prevention and Control of Pollution) Act, 1974 are all sources of environmental law.

The Constitution of India, the Industrial Disputes Act, 1947, and the Trade Unions Act, 1926 are all sources of labor law.

The Constitution of India, the Income Tax Act, 1961, and the Goods and Services Tax Act, 2017 are all sources of tax law.

The Constitution of India, the Indian Penal Code, 1860, and the Code of Criminal Procedure, 1973 are all sources of criminal law.

The Constitution of India, the Indian Contract Act, 1872, and the Sale of Goods Act, 1930 are all sources of civil law.

The Constitution of India, the Hindu Marriage Act, 1955, and the Muslim Personal Law (Shariat) Application Act, 1937 are all sources of family law.

The Constitution of India, the Transfer of Property Act, 1882, and the Indian Easements Act, 1882 are all sources of property law.

The Constitution of India, the Indian Evidence Act, 1872, and the Code of Criminal Procedure, 1973 are all sources of evidence law.