FIRST THING A BELIEVER IS ASKED ON THE DAY OF JUDGEMENT H 1098 "The first thing which a person will be asked about on the Day of Judgement will be prayer. If his prayer is found in order he will be successful and prosper. However, if that is not in order he will be ruined and a loser. If shortcomings are found in his obligations, Allah, the Mighty, the Glorified will say, 'See if My worshiper has some voluntary prayers in his account that might make up for the shortcomings in respect of his obligations.' All his obligations will be examined in this manner." R 1098 Tirmidhi with a chain up to Abu Hurairah who related that the Messenger of Allah, praise and peace be upon him, said this.
1081 - وعن أبي هريرة رضي الله عنه ، قَالَ : قال رَسُول اللهِ صلى الله عليه وآله وسلم : "إنَّ أوَّلَ مَا يُحَاسَبُ بِهِ العَبْدُ يَوْمَ القِيَامَةِ مِنْ عَمَلِهِ صَلاَتُهُ ، فَإنْ صَلَحَتْ ، فَقَدْ أفْلَحَ وأَنْجَحَ ، وَإنْ فَسَدَتْ ، فَقَدْ خَابَ وَخَسِرَ ، فَإنْ انْتَقَصَ مِنْ فَرِيضَتِهِ شَيْءٌ ، قَالَ الرَّبُ تعالى : انْظُرُوا هَلْ لِعَبدي من تطوّعٍ ، فَيُكَمَّلُ مِنْهَا مَا انْتَقَصَ مِنَ الفَرِيضَةِ ؟ ثُمَّ تَكُونُ سَائِرُ أعْمَالِهِ عَلَى هَذَا" رواه التِّرمِذِيُّ ، وَقَالَ : "حَدِيثٌ حَسَنٌ" .