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كتاب البيوع
34  
Sales and Trade
(82)
Chapter: The sale called Al-Muzabana; which is the sale of dried dates for fresh ones (that are still on the trees), and dried grapes for fresh grapes and the sale called Al-‘Araya (i.e., the selling of ripe fresh date, still over the palms, by means of estimation, for dry dates).
(82)
باب بَيْعِ الْمُزَابَنَة، وَهْيَ بَيْعُ الثَّمَرِ بِالتَّمْرِ وَبَيْعُ الزَّبِيبِ بِالْكَرْمِ وَبَيْعُ الْعَرَايَا
Sahih al-Bukhari 2188

Narrated Zaid bin Thabit:

Allah's Messenger (ﷺ) al lowed the owner of 'Araya to sell the fruits on the trees by means of estimation.

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، حَدَّثَنَا مَالِكٌ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنْ زَيْدِ بْنِ ثَابِتٍ ـ رضى الله عنهم ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَرْخَصَ لِصَاحِبِ الْعَرِيَّةِ أَنْ يَبِيعَهَا بِخَرْصِهَا‏.‏
Reference : Sahih al-Bukhari 2188
In-book reference : Book 34, Hadith 135
USC-MSA web (English) reference : Vol. 3, Book 34, Hadith 393
  (deprecated numbering scheme)