The Prophet ﷺ was brought a necklace in which there were gold and pearls. (The narrators AbuBakr and (Ahmad) Ibn Mani' said: The pearls were set with gold in it, and a man bought it for nine or seven dinars.) The Prophet ﷺ said: (It must not be sold) till the contents are considered separately. The narrator said: He returned it till the contents were considered separately. The narrator Ibn Asa said: By this I intended trade. Abu Dawud said: The word hijarah (stone) was recorded in his note-book before, but he changed it and narrated tijarah (trade).  

أُتِيَ النَّبِيُّ ﷺ عَامَ خَيْبَرَ بِقِلاَدَةٍ فِيهَا ذَهَبٌ وَخَرَزٌ قَالَ أَبُو بَكْرٍ وَابْنُ مَنِيعٍ فِيهَا خَرَزٌ مُعَلَّقَةٌ بِذَهَبٍ ابْتَاعَهَا رَجُلٌ بِتِسْعَةِ دَنَانِيرَ أَوْ بِسَبْعَةِ دَنَانِيرَ فَقَالَ النَّبِيُّ ﷺ لاَ حَتَّى تُمَيِّزَ بَيْنَهُ وَبَيْنَهُ فَقَالَ إِنَّمَا أَرَدْتُ الْحِجَارَةَ فَقَالَ النَّبِيُّ ﷺ لاَ حَتَّى تُمَيِّزَ بَيْنَهُمَا قَالَ فَرَدَّهُ حَتَّى مُيِّزَ بَيْنَهُمَا وَقَالَ ابْنُ عِيسَى أَرَدْتُ التِّجَارَةَ  

At the battle of Khaibar I bought a necklace in which there were gold and pearls for twelve dinars. I separated them and found that its worth was more than twelve dinars. So I mentioned that to the Prophet ﷺ who said: It must not be sold till the contents are considered separately.  

اشْتَرَيْتُ يَوْمَ خَيْبَرَ قِلاَدَةً بِاثْنَىْ عَشَرَ دِينَارًا فِيهَا ذَهَبٌ وَخَرَزٌ فَفَصَّلْتُهَا فَوَجَدْتُ فِيهَا أَكْثَرَ مِنَ اثْنَىْ عَشَرَ دِينَارًا فَذَكَرْتُ ذَلِكَ لِلنَّبِيِّ ﷺ فَقَالَ لاَ تُبَاعُ حَتَّى تُفَصَّلَ  

We were with the Messenger of Allah ﷺ at the battle of Khaibar. We were selling to the Jews one uqiyah of gold for one dinar. The narrators other than Qutaibah said: "for two or three dinars." Then both the versions agreed. The Messenger of Allah ﷺ said: Do not sell gold except with equal weight.  

كُنَّا مَعَ رَسُولِ اللَّهِ ﷺ يَوْمَ خَيْبَرَ نُبَايِعُ الْيَهُودَ الأُوقِيَّةَ مِنَ الذَّهَبِ بِالدِّينَارِ قَالَ غَيْرُ قُتَيْبَةَ بِالدِّينَارَيْنِ وَالثَّلاَثَةِ ثُمَّ اتَّفَقَا فَقَالَ قَالَ رَسُولُ اللَّهِ ﷺ لاَ تَبِيعُوا الذَّهَبَ بِالذَّهَبِ إِلاَّ وَزْنًا بِوَزْنٍ