The Book of Transactions
21/8. Chapter:
It is invalid to sell goods before taking possession of them
Sahih Muslim
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ الْقَعْنَبِيُّ، حَدَّثَنَا مَالِكٌ، ح وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " مَنِ ابْتَاعَ طَعَامًا فَلاَ يَبِعْهُ حَتَّى يَسْتَوْفِيَهُ " .
Ibn 'Umar (Allah be pleased with them) reported Allah's Messenger (ﷺ) as saying: He who buys foodgrain should not sell it until he has taken full possession of it.
Reference : Sahih Muslim 1526aIn-book reference : Book 21, Hadith 40USC-MSA web (English) reference : Book 10, Hadith 3644