مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٦٤٦ - PRAYERS AND FASTING
And if the direction of Qibla cannot be ascertained or guessed he may
offer prayers facing any side, although in such circumstances precaution
lies in that he should offer prayers turning his face in all the four
direction. These orders apply when it is possible to face Qibla,
otherwise the condition regarding facing Qibla ceases to be operative.
٢٩٠٩. If a person travels by an aeroplane whose
speed is equal to the speed of the earth and flies round the earth for
some time from east to west, he should, on the basis of precaution,
offer five prayers during twenty four hours. In such circumstances
fasting is apparently not obligatory. This is obvious if the journey is
performed at night, and if it is performed during daytime there is no
proof of its being obligatory during such a journey. But if the speed of
the aeroplane is such that it goes round the world during every twelve
hours it is difficult to prove by legal argument that offering every
particular prayer is obligatory when its time arrives. On the other hand
one should, on the basis of precaution, offer five prayers during every
twenty four hours. If an aeroplane flies from west to east and its
speed is equal to or less than that of the earth, it is evident that
offering of five prayers during the period d twenty four hours will be
obligatory. But if the speed of the aeroplane is more than that of the
earth e.g. if it goes round the earth once during a period of three
hours or less than that, the prayers will be regulated by the orders
contained in the foregoing article.
٢٩١٠. If a traveller is one of those travellers
upon whom it is obligatory to fast and after having observed fast at
dawn he travels by air and reaches a place where dawn has not yet
appeared it is apparently not obligatory on him to continue his fast
because fasting during night is, not permissible.
٢٩١١. If a person Who is fasting departs from his home town after the midday and reaches a place where the sun has not