بسم الله الرحمن الرحیم

(بقره/185):

شَهْرُ رَمَضَانَ الَّذِيَ  أُنزِلَ  فِيهِ  الْقُرْآنُ هُدًى لِّلنَّاسِ وَ بَيِّنَاتٍ  مِّنَ الْهُدَى وَالْفُرْقَانِ فَمَن  شَهِدَ  مِنكُمُ الشَّهْرَ فَلْيَصُمْهُ وَمَن كَانَ مَرِيضًا أَوْ عَلَى سَفَرٍ فَعِدَّةٌ  مِّنْ أَيَّامٍ أُخَرَ يُرِيدُ اللّهُ بِكُمُ الْيُسْرَ وَلاَ يُرِيدُ بِكُمُ الْعُسْرَ وَ لِتُكْمِلُواْ الْعِدَّةَ وَلِتُكَبِّرُواْ اللّهَ عَلَى مَا هَدَاكُمْ وَ لَعَلَّكُمْ تَشْكُرُونَ

  The month of Ramadan that wherein the Qur’an was sent down to

be a guidance for mankind, and as clear signs of guidance and a criterion (between

  right and wrong) . Therefore, whoever of you is present (at his home) during the

 month, he shall fast therein and whoever is sick or on a journey, he shall then (fast)

 the same number of other days; Allah desires ease for you, and He does not desire

 hardship for you; so you should complete the number (of days decreed) , and exalt

 Allah for His having guided you, and that haply you might be grateful to Him