What is the ruling for someone who ate or drank during the daytime in Ramadan forgetfully?

There is no harm to the fasting person, and their fast is valid if they eat, drink, or engage in marital relations out of forgetfulness, based on the words of Allah Almighty: ﴿Our Lord, do not hold us accountable if we forget or make a mistake﴾ and based on the words of the Prophet, peace be upon him: (Whoever forgets while fasting and eats or drinks, let him complete his fast, for indeed, it was Allah who fed him and gave him drink) and based on the words of the Prophet, peace be upon him: (Whoever breaks his fast in Ramadan out of forgetfulness, there is no make-up or expiation upon him).