They contain the self-experienced results and processes. They contain the processes to be followed and the objectives of the life to be attained. Early religions had a set of scriptural texts. Four Vedas of Hindus and three pitakas of the Buddhists are famous. Jains too have the twelve Agams of scriptural texts.
Later religions have a single scripture.
The Bible for the Christians, the Koran for the Muslims, the Avesta for the Persians, the Guru Granth Sahib for the Sikhs, etc. The scriptural texts of different religions are written in different languages. Later on the Jain scriptures were written in Sanskrit and the other languages. Both contain the Jain principles and practices, though the primary texts are the most important ones. The secondary texts are also imprortant.