Why are hadiths important for Islamic law and moral guidance?

Hadiths are essential to Islamic law and moral guidance because they serve as a primary record of the Sunnah—the established customs, practices, and sayings of the Prophet Muhammad. For Muslims, hadiths are considered the second most important source of religious authority after the Qur'an.12

In the context of Islamic law (Sharīʿah), hadiths provide the basis for legal rulings on matters not explicitly addressed in the Qur'an. Jurists, particularly following the work of al-Shāfiʿī, utilized these traditions to derive systematic legal rules. To ensure the integrity of this guidance, scholars developed ʿilm al-ḥadīth, a rigorous science used to evaluate the authenticity of reports and mitigate the impact of fabricated traditions.231

Beyond law, hadiths provide moral guidance by preserving the memory of the Prophet’s character and actions. They are used to cultivate piety, encourage virtue, and inform various aspects of Muslim life, including theology, Sufism, and daily ethical conduct.41