Sahih al-Bukhari, Hadith 6424 ⓘ
Narrated Abu Huraira: Allah's Messenger said, "Allah says, 'I have nothing to give but Paradise as a reward to my believer slave, who, if I cause his dear friend (or relative) to die, remains patient (and hopes for Allah's Reward).
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا يَعْقُوبُ بْنُ عَبْدِ الرَّحْمَنِ، عَنْ عَمْرٍو، عَنْ سَعِيدٍ الْمَقْبُرِيِّ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " يَقُولُ اللَّهُ تَعَالَى مَا لِعَبْدِي الْمُؤْمِنِ عِنْدِي جَزَاءٌ، إِذَا قَبَضْتُ صَفِيَّهُ مِنْ أَهْلِ الدُّنْيَا، ثُمَّ احْتَسَبَهُ إِلاَّ الْجَنَّةُ " .
also referenced under: Book 81, Hadith 13 (In-Book) & Volume 8, Book 76, Hadith 432 (USC-MSA)