Buying gold with money that is minted in all countries in installments

Q 2: Is it permissible to buy gold with money that is minted in all countries in installments like other items or is it necessary to pay on the spot without deferring payment? What is the evidence for this, whatever the ruling is? People buy their jewelry from shops in installments (Part No. 11; Page No. 97) without there being an immediate exchange of the purchased item for its price.

A: It is impermissible to sell gold for money even though it is not of the same nature except if you pay on the spot. This is due to the words of the Prophet (peace be upon him) on the things which include Riba (usury) where he said: If these classes differ, sell as you wish if payment is made hand to hand. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.