The will of Osama Bin Laden has revealed he left a personal fortune of around $29 million after his death in a raid in 2011.
It is among a trove of documents released to US media on March 1.
The will was seized in the US assault in Abbotabad, Pakistan.
Osama Bin Laden urged his family to “obey my will” and to spend his inheritance on “jihad, for the sake of Allah”.
In another letter, Osama Bin Laden urged his father to take care of his wife and children in the event of his death.
“If I am to be killed, pray for me a lot and give continuous charities in my name, as I will be in great need for support to reach the permanent home,” he wrote.
Although Osama Bin Laden referred to the money as being in Sudan, it is not clear whether it was in the form of cash or assets, or whether any of it made its way to his heirs.
Osama Bin Laden lived in Sudan for five years in the 1990s as a guest of the Sudanese government.
In other letters, he gave his assessment of the progress of the West’s “war on terror” and the US military campaign in Afghanistan.
“They thought that the war would be easy and that they would accomplish their objectives in a few days or a few weeks,” Osama Bin Laden wrote.
“We need to be patient a bit longer. With patience, there is victory!”
Osama Bin Laden was killed by US Special Forces in May 2011 in a raid on his compound in Abbotabad, Pakistan.
Al-Qaeda has since been led by the former second-in-command, Ayman al-Zawahiri.