[Machine] Al-Hasan bin Ali, may ﷺ , would observe his portion of staying up for worship from the beginning of the night. And Al-Husain, may ﷺ , would observe his portion of staying up for worship from the end of the night.
كَانَ الْحَسَنُ بْنُ عَلِيٍّ عَلَيْهِ السَّلَامُ يَأْخُذُ بِنَصِيبِهِ مِنَ الْقِيَامِ مِنْ أَوَّلِ اللَّيْلِ وَكَانَ الْحُسَيْنُ عَلَيْهِ السَّلَامُ يَأْخُذُهُ مِنْ آخِرِ اللَّيْلِ