The Messenger of Allah ﷺ forbade selling fruit until its ripeness becomes apparent. He forbade this to both the seller and the buyer. He also forbade traveling with the Quran into enemy territory, out of concern that the enemy might get hold of it.
حدثنا عبد الرحمن يعني ابن مهدي حدثنا مالك عن نافع
أن رسول الله ﷺ نهى عن بيع الثمرة حتى يبدو صلاحها نهى البائع والمشتري ونهى أن يسافر بالقرآن إلى أرض العدو مخافة أن يناله العدو
Its isnad is sahih. It appears in the Muwatta as two hadiths, the first at 2:124 and the second at 2:5, and their meaning has already been given at 4493 and 4507.