Sa'id (may Allah have mercy on him), the freed slave of Hasan bin Ali (may Allah be pleased with him), said: Ibn Umar (may Allah be pleased with them both) owed me some dirhams. I asked him for them, and he said: When I receive my stipend I will pay you. Sa'id said: When he received 100 dinars, I came to him. He said to his servant: Take these dinars to the market; when a price is set for them, give him his dirhams from it; and if he prefers that you sell them for dirhams, then do so and give him his dirhams.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلح / 11357