If anyone buys palm-trees after they have been fecundated the fruit belongs to the seller unless the buyer makes a proviso.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنْ بَاعَ نَخْلاً قَدْ أُبِّرَتْ فَثَمَرَتُهَا لِلْبَائِعِ إِلاَّ أَنْ يَشْتَرِطَ الْمُبْتَاعُ  

Whichever tree is bought with its roots, and if it is fecundatedits fruit would belong to one who has grafted it except when the provision is laid down by the buyer.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ أَيُّمَا نَخْلٍ اشْتُرِيَ أُصُولُهَا وَقَدْ أُبِّرَتْ فَإِنَّ ثَمَرَهَا لِلَّذِي أَبَّرَهَا إِلاَّ أَنْ يَشْتَرِطَ الَّذِي اشْتَرَاهَا  

Whosoever grafts the tree and then sells its roots, its fruit will belong to one who grafts it except when provision is laid down by the buyer.  

أَنَّ النَّبِيَّ ﷺ قَالَ أَيُّمَا امْرِئٍ أَبَّرَ نَخْلاً ثُمَّ بَاعَ أَصْلَهَا فَلِلَّذِي أَبَّرَ ثَمَرُ النَّخْلِ إِلاَّ أَنْ يَشْتَرِطَ الْمُبْتَاعُ  

This hadith has been narrated on the authority of Nafi, with the same chain of transmitters.  

عَنْ نَافِعٍ بِهَذَا الإِسْنَادِ نَحْوَهُ  

He who buys a tree after it has been fecundated, its fruit belongs to one who sells it except when the provision has been laid down by the buyer (that it will belong to him), and he who buys a slave, his property belongs to one who sells him except when a provision has been laid down by the buyer (that it will be transferred to him with the slave).  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مَنِ ابْتَاعَ نَخْلاً بَعْدَ أَنْ تُؤَبَّرَ فَثَمَرَتُهَا لِلَّذِي بَاعَهَا إِلاَّ أَنْ يَشْتَرِطَ الْمُبْتَاعُ وَمَنِ ابْتَاعَ عَبْدًا فَمَالُهُ لِلَّذِي بَاعَهُ إِلاَّ أَنْ يَشْتَرِطَ الْمُبْتَاعُ  

A hadith like this has been narrated on the authority of al Zuhri.  

عَنِ الزُّهْرِيِّ بِهَذَا الإِسْنَادِ مِثْلَهُ  

Ibn Umar reported on the authority of his father as Allah's Apostle ﷺ saying so.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ بِمِثْلِهِ