From Sahih Bukhari (Hadith 2184):
Narrated `Abdullah bin `Umar:Allah's Messenger (ﷺ) said, "Do not sell fruits of dates until they become free from all the dangers of being spoilt or blighted; and do not sell fresh dates for dry dates." Narrated Salim and `Abdullah from Zaid bin Thabit: "Later on Allah's Messenger (ﷺ) permitted the selling of ripe fruits on trees for fresh dates or dried dates in Bai'-al-'Araya, and did not allow it for any other kind of sale
Reference: Bukhari 2184