They embarked on a ship but they drowned and it is not known...

They embarked on a ship but they drowned and it is not known which one died first, the legacy belongs to the heirs of the one who had nothing and the heirs of the one who had the asset does not receive anything.’ Abu ‘Abd Allah, Alayhi al-Salam, said, ‘He (abu Hanifah) has heard it (the answer) and that is the way it is.’”

حسن كالصحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (3/203))