وَعَنْ فَضَالَةَ بْنِ عُبَيْدٍ رضى الله عنه
قَالَ: «اِشْتَرَيْتُ يَوْمَ خَيْبَرَ قِلَادَةً بِاِثْنَيْ عَشَرَ دِينَاراً، فِيهَا ذَهَبٌ وَخَرَزٌ، فَفَصَلْتُهَا فَوَجَدْتُ فِيهَا أَكْثَرَ مِنْ اِثْنَيْ عَشَرَ دِينَاراً، فَذَكَرْتُ ذَلِكَ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ: «لَا تُبَاعُ حَتَّى تُفْصَلَ»
I bought a necklace for twelve Dinars at the battle of Khaibar and it contained gold and gems. I considered them separately and found that it was worth more than twelve Dinars. I told the Prophet (sallallahu alayhi wa sallam) about that and he said, “It must not be sold till the contents are considered separately.”.
Bulugh al-Maram 961, Book 7, Business Transactions, Hadith 72. 1 min read