Sahih al-Bukhari, Hadith 2206 ⓘ
Narrated Ibn `Umar: The Prophet said, "Whoever pollinates date palms and then sells them, the fruits will belong to him unless the buyer stipulates that the fruits should belong to him (and the seller agrees).
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " أَيُّمَا امْرِئٍ أَبَّرَ نَخْلاً ثُمَّ بَاعَ أَصْلَهَا، فَلِلَّذِي أَبَّرَ ثَمَرُ النَّخْلِ، إِلاَّ أَنْ يَشْتَرِطَهُ الْمُبْتَاعُ " .
also referenced under: Book 34, Hadith 152 (In-Book) & Volume 3, Book 34, Hadith 408 (USC-MSA)