The knowledge that is obligatory for a Muslim to learn.

Question:
What is the minimum amount of Islamic jurisprudence and knowledge that a Muslim must learn in this life?

Answer:
Answer: Knowledge is of two types: essential knowledge, which is what upholds the religion of the Muslim, including his creed, his prayer, his zakah, his fasting, and his Hajj. This is necessary; every Muslim must learn this. He must learn the five pillars of Islam, understand their meanings, and act upon them. This is explained in detail in concise books, praise be to Allah. There is no difficulty in memorizing and reciting them, because they are useful and easy summaries. Therefore, no Muslim is excused from learning the pillars of Islam. As for any knowledge beyond that, such as the law of inheritance, the law of buying and selling, the law of judicial proceedings, the rulings on marriage, and so on, this is a collective obligation. If a sufficient number of people fulfill it, the sin is lifted from the rest. If everyone neglects it, they all sin. It is necessary that there be those who serve as a reference for Muslims in these matters they need. As for the first type, it is an individual obligation for every Muslim.