Sunan Abi Dawud 3371
سنن أبي داود#3371SahihNarrated Anas ibn Malik: The Prophet (ﷺ) forbade the sale of grapes till they became black and the sale of grain till it had become hard
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 23:46