Zaid bin Thabit (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings of Allah be upon him) permitted the sale of ‘Araya by estimation.

Imam Tirmidhi says:
1- This hadith is Hasan Sahih.
2- Some people of knowledge act upon this, among whom are Shafi’i, Ahmad, and Ishaq bin Rahwayh. These people say that among the things from which the Prophet (peace and blessings of Allah be upon him) forbade, ‘Araya is an exception, because he forbade Muhaqala and Muzabana. They have deduced from the hadith of Zaid bin Thabit and Abu Hurairah, and their opinion is that it is permissible to buy less than five wasqs.
3- According to some people of knowledge, its meaning is that the Prophet (peace and blessings of Allah be upon him) intended to give ease and allowance in this matter, because the owners of ‘Araya complained to him and said that apart from dried dates, they had nothing with which to buy fresh dates. So he permitted them to buy for less than five wasqs so that they could eat fresh dates.