Zaid b. Thabit (Allah be pleased with him) reported Messenger of Allah ﷺ granting concession in case of 'ariyya transactions and that implies selling of (dry dates for fresh dates) according to a measure. (Using translation from Muslim 1539h)
«أَنَّ رَسُولَ اللهِ ﷺ رَخَّصَ فِي بَيْعِ الْعَرَايَا أَنْ تُبَاعَ بِخَرْصِهَا كَيْلًا»