The Prophet (ﷺ) allowed the sale of the dates of 'Araya provided they were about five Awsuq (singular: Wasaq which means sixty Sa's) or less (in amount).
Sahih al-Bukhari Book 34, Hadith 137
← Previous Hadith The Prophet (ﷺ) forbade the selling of fruits unless they get ripe, and none of them should be sold except for Dinar or Dirham (i.e. money), except the 'Araya trees (the dates of which could be sold for dates).

Sahih al-Bukhari Book 34, Hadith 136 Next Hadith → Allah's Messenger (ﷺ) forbade the selling of fruits (fresh dates) for dried dates but allowed the sale of fruits on the 'Araya by estimation and their new owners might eat their dates fresh. Sufyan (in another narration) said, "I told Yahya (a sub-narrator) when I was a mere boy, 'Meccans say that the Prophet (ﷺ) allowed them the sale of the fruits on 'Araya by estimation.' Yahya asked, 'How do the Meccans know about it?' I replied, 'They narrated it (from the Prophet (ﷺ) ) through Jabir.' On that, Yahya kept quiet." Sufyan said, "I meant that Jabir belonged to Medina." Sufyan was asked whether in Jabir's narration there was any prohibition of selling fruits before their benefit is evident (i.e. no dangers of being spoilt or blighted). He replied that there was none.

Sahih al-Bukhari Book 34, Hadith 138