Abu Dawud
Commercial Transactions
Book Number: 016 / Hadith Number: 3345
Narated By Fudalah ibn Ubayd : The Prophet (pbuh) 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 (pbuh) 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.