Does money bequeathed as "assistance" to a friend, after the death of both the testator and the legatee in the same accident, go to the friend's heirs or remain with the testator's heirs?

The cases of the legatee's death, either before or after the testator, can be summarized into three scenarios: First, if the legatee dies before the testator, or it is highly probable that he did, then the bequest becomes void. Second, if the legatee dies after the testator but before accepting or rejecting the bequest, then his heirs stand in his place regarding acceptance or rejection. Third, if it is unknown who died first, then the bequest also becomes void. It is recommended to consult the Sharia court to resolve any disputes.