Those who said when you exchange currency, do not part from him while any ambiguity remains between you

Sayyiduna Ibn Umar (may Allah be pleased with them both) said: I used to sell gold for silver and silver for gold. I came to the Prophet (peace and blessings be upon him) and asked him about it. He (peace and blessings be upon him) said: "When you transact with your companion, do not part from him as long as any ambiguity remains between you."

Sayyiduna Ibn Umar (may Allah be pleased with them both) said: "When you transact with a dinar, do not get up from there until you have received the price."

Sayyiduna Umar (may Allah be pleased with him) said: "If he asks you for respite, even for the time it takes to milk a she-camel (in a currency exchange sale), do not grant it."

Sayyiduna Talhah (may Allah be pleased with him) took dinars in exchange for silver, and Sayyiduna Umar (may Allah be pleased with him) forbade him from parting from the other party until he had received the full price.

The Prophet (peace and blessings be upon him) said: "Usury (riba) is only in credit."

Al-Hasan and Ibn Sirin (may Allah have mercy on them) said: "When you sell gold for silver, do not part as long as a condition remains between you, unless it is cash."

Sayyiduna Ibn Umar (may Allah be pleased with them both) was asked: "What is the ruling on selling gold on credit?" He said: "I heard Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) on this pulpit when he was asked about it, and he said: 'However short a time he has deferred it, all of it is usury (riba).'"

Ibrahim said: The buyer and the seller shall not part until they have cut off (that is, settled in full) what is between them.

Shurayh said: In a currency exchange sale (sarf), what is preferable in my view is that they separate with no ambiguity remaining between them.