Aisha reported: I never felt so jealous about any woman as I did for Khadija, although she had died three years before I married the Prophet, peace and blessings be upon him. That was because I heard him mentioning her so often and because his Lord has ordered him to give her glad tidings that she would have a palace in Paradise made of reeds; and also because the Prophet would slaughter a sheep and distribute its meat among her friends.
Source: Sahih Bukhari 5658
Grade: Sahih (authentic) according to Al-Bukhari
عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ مَا غِرْتُ عَلَى امْرَأَةٍ مَا غِرْتُ عَلَى خَدِيجَةَ وَلَقَدْ هَلَكَتْ قَبْلَ أَنْ يَتَزَوَّجَنِي بِثَلَاثِ سِنِينَ لِمَا كُنْتُ أَسْمَعُهُ يَذْكُرُهَا وَلَقَدْ أَمَرَهُ رَبُّهُ أَنْ يُبَشِّرَهَا بِبَيْتٍ فِي الْجَنَّةِ مِنْ قَصَبٍ وَإِنْ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَيَذْبَحُ الشَّاةَ ثُمَّ يُهْدِي فِي خُلَّتِهَا مِنْهَا
5658 صحيح البخاري كِتَاب الْأَدَبِ بَاب حُسْنُ الْعَهْدِ مِنْ الْإِيمَانِ