Do not buy the fruit until their condition is clear, and do not buy the fresh dates. A hadith like this has been reported by Ibn 'Umar through another chain of transmitters.
Sahih Muslim Book 21, Hadith 76
← Previous Hadith Zaid b. Thabit (Allah be pleased with him) said that Allah's Messenger (ﷺ) gave a concession in case of the sale known as al-araya, there is an addition of the word an tuba'a in the hadith transmitted by Ibn Numair.

Sahih Muslim Book 21, Hadith 75 Next Hadith → Do not sell fresh fruits on the trees until their good condition becomes manifest, and do not sell fresh dates on the trees against dry dates. Salim said: Abdullah informed me on the authority of Zaid b. Thabit, Allah's Messenger (ﷺ) having given concession afterwards in case of ariyya transactions by which dry dates can be exchanged with fresh dates, but he did not permit it in other cases.

Sahih Muslim Book 21, Hadith 77