The Holy Quran, Chapter Az-Zariyat - الذاريات

وَأَتِمُّواْ الْحَجَّ وَالْعُمْرَةَ لِلّهِ فَإِنْ أُحْصِرْتُمْ فَمَا اسْتَيْسَرَ مِنَ الْهَدْيِ وَلاَ تَحْلِقُواْ رُؤُوسَكُمْ حَتَّى يَبْلُغَ الْهَدْيُ مَحِلَّهُ فَمَن كَانَ مِنكُم مَّرِيضاً أَوْ بِهِ أَذًى مِّن رَّأْسِهِ فَفِدْيَةٌ مِّن صِيَامٍ أَوْ صَدَقَةٍ أَوْ نُسُكٍ فَإِذَا أَمِنتُمْ فَمَن تَمَتَّعَ بِالْعُمْرَةِ إِلَى الْحَجِّ فَمَا اسْتَيْسَرَ مِنَ الْهَدْيِ فَمَن لَّمْ يَجِدْ فَصِيَامُ ثَلاثَةِ أَيَّامٍ فِي الْحَجِّ وَسَبْعَةٍ إِذَا رَجَعْتُمْ تِلْكَ عَشَرَةٌ كَامِلَةٌ ذَلِكَ لِمَن لَّمْ يَكُنْ أَهْلُهُ حَاضِرِي الْمَسْجِدِ الْحَرَامِ وَاتَّقُواْ اللّهَ وَاعْلَمُواْ أَنَّ اللّهَ شَدِيدُ الْعِقَابِ

Perform the pilgrimage and the visit (to Mecca) for Allah. And if ye are prevented, then send such gifts as can be obtained with ease, and shave not your heads until the gifts have reached their destination. And whoever among you is sick or hath an ailment of the head must pay a ransom of fasting or alms giving or offering. And if ye are in safety, then whosoever contenteth himself with the Visit for the Pilgrimage (shall give) such gifts as can be had with ease. And whosoever cannot find (such gifts, then a fast of three days while on the pilgrimage, and of seven when ye have returned; that is, ten in all. That is for him whose folk are not present at the Inviolable Place of Worship. Observe your duty to Allah, and know that Allah is severe in punishment.