Machine summary:
Law is a part of Ilm al-Sharia (the science of Sharia) and the divine rulings of Islam; therefore, we find legal interpretation of the Quran to be very close to the interpretation of the Ayat al-Ahkam of the Quran, in such a way that the collection of commentaries written on the Quran with jurisprudential concern are, from one perspective, also legal interpretations.
Furthermore, the science of law, in order to extract its rules, requires a source that determines the principles and foundation of the legal system in question; therefore, one of the topics discussed in Islamic law is the explanation and elaboration of the position of the four sources, with the Quran at their head.
Attention to the legal interpretation of the Quran is very important from this perspective; of course, not in the sense that this interpretive method should be a tool for adaptation to the demands that, in the modern world, the human being—who is entirely demanding—claims from space and time as human rights; but rather to prove to everyone how religion, claiming finality, presented the highest imaginable teachings in the field of human rights many centuries ago.
For the first time, the Messenger of Allah( used the legal verses of the Quran and their interpretation and explanation, and one of the prominent instances was the Prophet's use of the verse (النَّبِيُّ أَوْلَى بِالْمُؤْمِنِينَ مِنْ أَنفُسِهِمْ( during the Eid of Ghadir Khumm and obtaining acknowledgment from the people regarding the issue of Wilayah (guardianship) and then announcing the succession of Ali( (Amini, Muhammad Husayn, Al-Ghadir, 1, 165).