It is recommended to send the weak among women and others ahead from Al-Muzdalifah to Mina at the end of the night, before it gets crowded, but it is recommended for others to stay there until they have prayed Subh in Al-Muzdalifah

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ أَبِي، يَزِيدَ أَنَّهُ سَمِعَ ابْنَ عَبَّاسٍ، يَقُولُ أَنَا مِمَّنْ، قَدَّمَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي ضَعَفَةِ أَهْلِهِ ‏.‏