'Amr bin sa'eed bin Abi Husain told us that: 'Amr bin Shu'aib wrote to 'Abdullah bin 'Abdur-Rahman bin Abi Husain to offer condolences for a son of his who had died. In his letter he mentioned that he had heard his father narrate, that his grandfather, 'Abdullah bin 'Amr bin Al-As said: "The Messenger of Allah (ﷺ) said: 'Allah does not approve for His believing slave, if He takes away his loved one from among the people of the Earth, and he bears that with patience and seeks reward, and says that which he is commanded any reward less than Paradise."'
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ حَدَّثَنَا عَبْدُ اللَّهِ، قَالَ أَنْبَأَنَا عُمَرُ بْنُ سَعِيدِ بْنِ أَبِي حُسَيْنٍ، أَنَّ عَمْرَو بْنَ شُعَيْبٍ، كَتَبَ إِلَى عَبْدِ اللَّهِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبِي حُسَيْنٍ يُعَزِّيهِ بِابْنٍ لَهُ هَلَكَ وَذَكَرَ فِي كِتَابِهِ أَنَّهُ سَمِعَ أَبَاهُ يُحَدِّثُ عَنْ جَدِّهِ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّ اللَّهَ لاَ يَرْضَى لِعَبْدِهِ الْمُؤْمِنِ إِذَا ذَهَبَ بِصَفِيِّهِ مِنْ أَهْلِ الأَرْضِ فَصَبَرَ وَاحْتَسَبَ وَقَالَ مَا أُمِرَ بِهِ بِثَوَابٍ دُونَ الْجَنَّةِ " .
sunnah.com