What is the ruling on the fast of one who committed backbiting during the daytime in Ramadan?

The fast of one who backbites is valid according to the majority of scholars, and it has been narrated as a consensus. Only Al-Awza'i differed on this matter. However, backbiting is a grave sin and forbidden, and its prohibition becomes even more severe during fasting, based on the Almighty's saying: "O you who have believed, prescribed for you is fasting as it was prescribed for those before you, that you may become righteous" (2:183), and the Prophet's (peace be upon him) saying: "Whoever does not abandon false speech, acting upon it, and ignorance, Allah has no need for him to abandon his food and drink."