The practice of Mudarabah (or Mudaraba) dates back to pre-Islamic Arabia and was used by the Prophet (PBUH) when he managed the trade caravans of Khadija (RA). It is a key instrument in modern Islamic banking for savings accounts and investment funds. By aligning the interests of the investor and the manager, Mudarabah promotes a more equitable distribution of risk and reward, contrasting with the conventional banking model where the borrower bears all the risk while the lender is guaranteed interest. Mudarabah is a profit-sharing contract where one party provides capital (rab al-mal) and the other provides expertise and labor (mudarib). Profits are shared according to an agreed ratio; losses are borne solely by the capital provider, unless due to negligence or misconduct. Mudarabah is used for investment accounts in Islamic banks. Customers deposit funds, and the bank acts as mudarib, investing in Sharia-compliant ventures. Profits are shared, and losses are deducted from the principal (if they occur). Mudarabah is also used for venture capital and project financing. It allows investors to fund entrepreneurs without charging interest, sharing in the risk and reward. The Prophet used Mudarabah when he managed Khadija's trade caravans. This demonstrates its historical legitimacy. For believers, Mudarabah is a Sharia-compliant alternative to interest-based investments. It aligns with the Islamic prohibition of riba (usury) by replacing guaranteed interest with shared risk and reward. The believer chooses Mudarabah to invest in a way that is pleasing to Allah, supporting entrepreneurs and sharing in the real economy.