“The first thing for which a person will be brought to account on the Day of Resurrection will be his prayer. If it is complete, then the voluntary (prayers) will also be recorded for him (as an increase). If it is not complete then Allah will say to His angels: ‘Look and see whether you find any voluntary prayers for My slave, and take them to make up what is lacking from his obligatory prayers.’ Then all his deeds will be reckoned in like manner.”
عَنِ النَّبِيِّ ﷺ ح وَحَدَّثَنَا الْحَسَنُ بْنُ مُحَمَّدِ بْنِ الصَّبَّاحِ حَدَّثَنَا عَفَّانُ حَدَّثَنَا حَمَّادٌ أَنْبَأَنَا حُمَيْدٌ عَنِ الْحَسَنِ عَنْ رَجُلٍ عَنْ أَبِي هُرَيْرَةَ وَدَاوُدُ بْنُ أَبِي هِنْدٍ عَنْ زُرَارَةَ بْنِ أَوْفَى عَنْ تَمِيمٍ الدَّارِيِّ عَنِ النَّبِيِّ ﷺ قَالَ أَوَّلُ مَا يُحَاسَبُ بِهِ الْعَبْدُ يَوْمَ الْقِيَامَةِ صَلاَتُهُ فَإِنْ أَكْمَلَهَا كُتِبَتْ لَهُ نَافِلَةً فَإِنْ لَمْ يَكُنْ أَكْمَلَهَا قَالَ اللَّهُ سُبْحَانَهُ لِمَلاَئِكَتِهِ انْظُرُوا هَلْ تَجِدُونَ لِعَبْدِي مِنْ تَطَوُّعٍ؟ فَأَكْمِلُوا بِهَا مَا ضَيَّعَ مِنْ فَرِيضَتِهِ ثُمَّ تُؤْخَذُ الأَعْمَالُ عَلَى حَسَبِ ذَلِكَ