"The Messenger of Allah ﷺ prohibited selling date-palms until they have blossomed."  

أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى عَنْ بَيْعِ النَّخْلِ حَتَّى يَزْهُوَ  

"The Prophet ﷺ prohibited selling ears (of grain) until they have whitened (shown their kernals) and are safe from blight, he forbade it for the seller and the buyer." [He said:] There are narrations on this topic from Anas, Ibn 'Abbas, Jabir, Abu Sa'eed, and Zaid bin Thabit.  

أَنَّ النَّبِيَّ ﷺ نَهَى عَنْ بَيْعِ السُّنْبُلِ حَتَّى يَبْيَضَّ وَيَأْمَنَ الْعَاهَةَ نَهَى الْبَائِعَ وَالْمُشْتَرِيَ قَالَ وَفِي الْبَابِ عَنْ أَنَسٍ وَعَائِشَةَ وَأَبِي هُرَيْرَةَ وَابْنِ عَبَّاسٍ وَجَابِرٍ وَأَبِي سَعِيدٍ وَزَيْدِ بْنِ ثَابِتٍ  

"The Messenger of Allah ﷺ prohibited selling grapes until they appear and selling grains until they become firm."  

أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى عَنْ بَيْعِ الْعِنَبِ حَتَّى يَسْوَدَّ وَعَنْ بَيْعِ الْحَبِّ حَتَّى يَشْتَدَّ