Sahih Bukhari Volume 2, Book 23, Hadith 1289

قَالَ ابْنُ عَبَّاسٍ ـ رضى الله عنهما فَلَمَّا مَاتَ عُمَرُ ـ رضى الله عنه ـ ذَكَرْتُ ذَلِكَ لِعَائِشَةَ ـ رضى الله عنها ـ فَقَالَتْ رَحِمَ اللَّهُ عُمَرَ، وَاللَّهِ مَا حَدَّثَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِنَّ اللَّهَ لَيُعَذِّبُ الْمُؤْمِنَ بِبُكَاءِ أَهْلِهِ عَلَيْهِ‏.‏ وَلَكِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ إِنَّ اللَّهَ لَيَزِيدُ الْكَافِرَ عَذَابًا بِبُكَاءِ أَهْلِهِ عَلَيْهِ ‏"‏‏.‏ وَقَالَتْ حَسْبُكُمُ الْقُرْآنُ ‏{‏وَلاَ تَزِرُ وَازِرَةٌ وِزْرَ أُخْرَى‏}‏‏.‏ قَالَ ابْنُ عَبَّاسٍ ـ رضى الله عنهما ـ عِنْدَ ذَلِكَ وَاللَّهُ هُوَ أَضْحَكَ وَأَبْكَى‏.‏ قَالَ ابْنُ أَبِي مُلَيْكَةَ وَاللَّهِ مَا قَالَ ابْنُ عُمَرَ ـ رضى الله عنهما ـ شَيْئًا‏

Ibn Abbas added, "When 'Umar died I told all this to 'Aisha and she said, 'May Allah be merciful to Umar. By Allah, Allah's Apostle did not say that a believer is punished by the weeping of his relatives. But he said, Allah increases the punishment of a non-believer because of the weeping of his relatives." 'Aisha further added, "The Qur'an is sufficient for you (to clear up this point) as Allah has stated: 'No burdened soul will bear another's burden.' " (35.18). Ibn Abbas then said, "Only Allah makes one laugh or cry." Ibn Umar did not say anything after that.