What should the questioner do with the money left with him by his deceased paternal uncle, knowing that the uncle verbally advised him before his death not to give the money to his children but to donate it, and that the money does not exceed one-third of his estate?

If your uncle appointed you as his agent to donate money during his lifetime, and you delayed until he passed away, then you are obligated to donate the full amount. However, if the money was a trust held by you, and he asked you to donate what remains after his death, then it falls under the ruling of a will. If it does not exceed one-third of the inheritance, then you are obligated to donate the full amount. If it exceeds one-third, then you donate one-third and return the remainder to the heirs. If the owner of the money did not specify a particular recipient, then it should be given to the poor and needy.