(75) باب النَّخْلِ يُبَاعُ أَصْلُهَا وَيَسْتَثْنِي الْمُشْتَرِي ثَمَرَهَا
It was narrated from Ibn 'Umar that the Prophet said:
"Any man who pollinates a date-palm tree then sells it, the fruits of the tree are for the one who pollinated it, unless the purchaser stipulated otherwise."
Reference: Sunan an-Nasa'i 4635
In-book reference: Book 44, Hadith 187
English translation: Vol. 5, Book 44, Hadith 4639