Ibn Umar (Allah be pleased with them) reported Messenger of Allah ﷺ as saying: If anyone buys palm-trees after they have been fecundated the fruit belongs to the seller unless the buyer makes a proviso.

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ
" مَنْ بَاعَ نَخْلاً قَدْ أُبِّرَتْ فَثَمَرَتُهَا لِلْبَائِعِ إِلاَّ أَنْ يَشْتَرِطَ الْمُبْتَاعُ ".