Sharjeel reports that it is narrated from Ibn Umar (may Allah be pleased with him), Abu Hurairah (may Allah be pleased with him), and Abu Saeed Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Gold for gold and silver for silver should be exchanged in equal measure, whoever adds or demands an addition has engaged in usury. Sharjeel says: If I had not heard this hadith with my own ears, may Allah admit me into Hell.