It was narrated that Ibn 'Umar said: "I came to the Prophet and said: “Wait, I want to ask you something. I sell camels in Al-Baqi with a price set in Dinars but I accept Dirhams instead.' He said: “There is nothing wrong with it if you take the price on that day, still unfinished business between you both (buyer and seller)””"
DaifDaifHasanBook 44 · Hadith 141