Ibn Umar (Allah be pleased with them) reported Allah's Apostle ﷺ forbidding the sale of fruits until their good condition becomes evident and the purchase of dates for dates.

أَنَّ النَّبِيَّ ﷺ نَهَى عَنْ بَيْعِ الثَّمَرِ حَتَّى يَبْدُوَ صَلاَحُهُ وَعَنْ بَيْعِ الثَّمَرِ بِالتَّمْرِ