fears that he may become thirsty later on, and there is someone who is
thirsty now, does he have to givehim water or not?
Praise be to Allaah.
Ibn Hajar al-Haythami was asked this question and he replied:
Two views were mentioned in al-Majmoo', in (the chapter called)
al-Muqaddam, and I do not know of anyone who stated that one of them
was more correct than theother. The one which appears to be more
correct is that he should give water to the one who is thirsty at that
time, if there is the fear that he will die of thirst, because his
death is certain, unlike the one who has the water, who has the chance
of finding more water later on. But if he is in an arid land where he
despairs of finding water and he thinks it most likely that death is
inevitable if he gives away the water thathe has with him, then the
matter is subject to further discussion, and it is more likely that
giving the water in this case is not obligatory. The same applies if
the thirsty person fears that he may lose a limb or become sicketc.
because of his thirst, and the one who has the water fears that he may
die later on, then it is also more likely to be correct that he does
not have to give away the water.