1302 - وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «إِنَّ رَسُولَ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ لَمَّا نَزَلَ عَلَيْهِ جَبْرَئِيلُ بِالتَّقْصِيرِ قَالَ لَهُ اَلنَّبِيُّ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ «فِي كَمْ ذَلِكَ» فَقَالَ فِي بَرِيدٍ قَالَ «وَ كَمِ اَلْبَرِيدُ» قَالَ مَا بَيْنَ ظِلِّ عَيْرٍ إِلَى فَيْءِ وُعَيْرٍ فَذَرَعَتْهُ بَنُو أُمَيَّةَ ثُمَّ جَزَّءُوهُ عَلَى اِثْنَيْ عَشَرَ مِيلاً فَكَانَ كُلُّ مِيلٍ أَلْفاً وَ خَمْسَمِائَةِ ذِرَاعٍ وَ هُوَ أَرْبَعَةُ فَرَاسِخَ.
Hadith.1302 - Imam Jafar ibn Muhammad Al-Sadiq 
said:
"When Archangel Jibril descended upon the Messenger of Allah ﷺ with the ruling of shortening (the prayer), the Prophet ﷺ asked him, 'For how long (a distance) is this required?'
Archangel Jibril replied: 'For a barid.'
The Prophet ﷺ asked: 'And what is a barid?'
Jibril said: 'The distance between the shadow of 'Ayr to the shade of Wu'ayr.'
The Banu Umayyah measured it, divided it into twelve miles, with each mile being one thousand five hundred cubits, equating to four farsakhs (parasangs).'"
