Qiyas is an Islamic legal term that refers to the process of analogical reasoning used to derive legal rulings. It involves comparing a new situation or issue to a known case in Islamic law, where the ruling is already established. This method helps scholars apply existing laws to new circumstances that may not be explicitly addressed in the Quran or Hadith. Through qiyas, jurists can maintain consistency in legal decisions while adapting to changing societal needs. It is one of the four primary sources of Islamic jurisprudence, alongside Quran, Hadith, and Ijma (consensus). This approach ensures that Islamic law remains relevant and applicable in various contexts.