about how to exchange gold for other gold at a gold shop?

Question:
May Allah reward you with good. The questioner, Muhammad Ali Faa from Riyadh, asks: What is the ruling on a person who sells gold to the shop owner and then buys other gold from him for an amount close to the price he sold it for, and then pays him the value of the gold he bought from the value of the gold he sold to him, which he has not yet received?

Answer:
It is obligatory that when a person wants to exchange his gold for better gold, he sells the gold he has for dirhams, then buys with the dirhams the gold he wants from the shop owner or someone else. He sells the gold he has, receives its value, and delivers the gold to the buyer, then buys with that value whatever type of gold he wishes. Yes.