The Prophet (sallallahu alayhi wa sallam) forbade the sale of grapes till they become black (i.e. ripe) and the sale of grain till it becomes hard (i.e. ripe).
وَعَنْ أَنَسِ بْنِ مَالِكٍ رضى الله عنه
«أَنَّ اَلنَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ بَيْعِ اَلْعِنَبِ حَتَّى يَسْوَدَّ، وَعَنْ بَيْعِ اَلْحَبِّ حَتَّى يَشْتَدَّ»
The Prophet (sallallahu alayhi wa sallam) forbade the sale of grapes till they become black (i.e. ripe) and the sale of grain till it becomes hard (i.e. ripe).
صحيح. رواه أبو داود (3371)، والترمذي (1228)، وابن ماجه (2217)، وأحمد (3 / 221 و 250)، وابن حبان (4972)، والحاكم (2 / 19). وقال الحاكم: «صحيح على شرط مسلم «وهو كما قال»
Who passed it on, from Ibn Hajar back to the one who was there.
The same words, in another collection.
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