Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) addressed the people and said: "Whoever wishes to ask about the Qur'an, let him go to Ubayy bin Ka'b; whoever wishes to ask about the lawful and the unlawful, let him go to Mu'adh bin Jabal; whoever wishes to inquire about the obligatory shares of inheritance, let him go to Zayd bin Thabit; and whoever wishes to ask about wealth, let him come to me, for I am its treasurer." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.