Sahih Muslim Book - 51, Hadith - 7172

حَدَّثَنَا ابْنُ أَبِى عُمَرَ حَدَّثَنَا سُفْيَانُ عَنْ أَبِى الزِّنَادِ عَنِ الأَعْرَجِ عَنْ أَبِى هُرَيْرَةَ قَالَ قَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « احْتَجَّتِ النَّارُ وَالْجَنَّةُ فَقَالَتْ هَذِهِ يَدْخُلُنِى الْجَبَّارُونَ وَالْمُتَكَبِّرُونَ. وَقَالَتْ هَذِهِ يَدْخُلُنِى الضُّعَفَاءُ وَالْمَسَاكِينُ فَقَالَ اللَّهُ عَزَّ وَجَلَّ لِهَذِهِ أَنْتِ عَذَابِى أُعَذِّبُ بِكِ مَنْ أَشَاءُ - وَرُبَّمَا قَالَ أُصِيبُ بِكِ مَنْ أَشَاءُ - وَقَالَ لِهَذِهِ أَنْتِ رَحْمَتِى أَرْحَمُ بِكِ مَنْ أَشَاءُ وَلِكُلِّ وَاحِدَةٍ مِنْكُمَا مِلْؤُهَا ».

It was narrated that Abu Hurairah said: "The Messenger of Allah (s.a.w) said: 'The Fire and Paradise argued. One said: "I will be entered by the arrogant and proud." The other said: "I will be entered by the weak and poor." Allah, Glorified and Exalted is He, said to the one: "You are My punishment, with which I will punish whomsoever I will." - and perhaps He said: "which I will inflict upon whomsoever I will." - and He said to the other: "You are My mercy, by which I will show mercy to whomsoever I will, and each of you will be full."