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How much can I bequeath in an Islamic will?
The sum of all bequests may not exceed one-third (1/3) of the estate. One-third of the estate was the maximum allocation allowed by the Prophet, may peace be upon him. When Saad Ibn Abi-Waqqas (may Allah be with him) consulted the Prophet (may peace be upon him) about giving two-thirds of his money to charity, the Prophet (may peace be upon him) rejected the two-thirds suggestion and when Saad (may Allah please be with him) then suggested one half, the Prophet (may peace be upon him) rejected that too. Finally, Saad (may Allah be with him) suggested one-third, which the Prophet (may peace be upon him) reluctantly approved. He said, 'A third then, and a third is a lot.'