All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and messenger.
This money is unlawful for this man and it is impermissible for him to possess it in any shape or form. It is incumbent on him to return this money to the party that has given it to him if he does not have any hope of being able to spend this money to achieve the purpose for which it was given to him.
If he cannot return it to its owner, he should spend it on the public welfare such as in hospital maintenance and so on in a village other than his.
Allaah Knows best.