Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “The first action for which a servant of Allah will be held accountable on the Day of Resurrection will be his prayers. If they are in order, he will have prospered and succeeded. If they are lacking, he will have failed and lost. If there is something defective in his obligatory prayers, then the Almighty Lord will say: See if My servant has any voluntary prayers that can complete what is insufficient in his obligatory prayers. The rest of his deeds will be judged the same way.”
Source: Sunan al-Tirmidhī 413
Grade: Sahih (authentic) according to Al-Albani
عَنْ أَبِي هُرَيْرَةَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّ أَوَّلَ مَا يُحَاسَبُ بِهِ الْعَبْدُ يَوْمَ الْقِيَامَةِ مِنْ عَمَلِهِ صَلَاتُهُ فَإِنْ صَلُحَتْ فَقَدْ أَفْلَحَ وَأَنْجَحَ وَإِنْ فَسَدَتْ فَقَدْ خَابَ وَخَسِرَ فَإِنْ انْتَقَصَ مِنْ فَرِيضَتِهِ شَيْءٌ قَالَ الرَّبُّ عَزَّ وَجَلَّ انْظُرُوا هَلْ لِعَبْدِي مِنْ تَطَوُّعٍ فَيُكَمَّلَ بِهَا مَا انْتَقَصَ مِنْ الْفَرِيضَةِ ثُمَّ يَكُونُ سَائِرُ عَمَلِهِ عَلَى ذَلِكَ
413 سنن الترمذي كتاب الصلاة باب ما جاء أن أول ما يحاسب به العبد يوم القيامة الصلاة
2020 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الجامع