Sunan at-Tirmithiy كتاب البيوع باب ما جاء فى شراء القلادة وفيها ذهب وخرز
Faḍālah Ibn-'Ubayd said, "I bought a necklace made of gold and beads for twelve Dinars on the day of Khaybar. When I separated the beads from the gold, I found its value to be worth more than twelve Dinars. I mentioned this to the Prophet, peace and blessings of God be upon him, who said, 'It should not be sold until the beads are separated from the gold.'" Click on ḥadīth to read more