عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَذِنَ لِضَعَفَةِ النَّاسِ مِنَ الْمُزْدَلِفَةِ بِلَيْلٍ
It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) had permitted the weak people to leave Muzdalifah at night.