Commercial Transactions (Kitab Al-Buyu)
Dawud :: Book 22 : Hadith 3345
Narrated Fudalah ibn Ubayd:
The Prophet (peace_be_upon_him) 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 (peace_be_upon_him) 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.