Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "The pledge is not to be forfeited; its gain is the owner's, and its loss is his as well."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الرهن / 11220