Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: Whoever learns the Qur'an should also learn the fara'id (laws of inheritance), and let him not be like the man whom a Bedouin meets and says: O servant of Allah! Are you a Bedouin or an emigrant (Muhajir)? If he says: I am an emigrant, the Bedouin says: A person from my family has died; how will his inheritance be divided? So if he knows, it is good for him, (a knowledge) which Allah has given him; but if he says: I do not know, the Bedouin will say: Then what superiority do you have over us? You learn the Qur'an but you do not learn the fara'id.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12179