Malik said about enemy soldiers who were found on the seashore of
a Muslim land, and they claimed that they were merchants and that the
sea had driven them ashore, while the Muslims were not able to verify
any of that except that their ships were damaged, or they were thirsty
and had disembarked without the permission of the Muslims, "I think
that it is up to the imam to give his opinion about them, and I do not
think that the tax of one fifth is taken from them."
Muwatta Malik Book 21, Hadith 17