If a fasting person eats or drinks forgetfully during the month of Ramadan, their fast remains valid, and they are not required to perform any kaffara.

The Quran does contain verses that highlight the consideration of human forgetfulness and mistakes. While there may not be a specific verse addressing forgetfulness in the context of fasting.

One such verse is in Surah Al-Baqarah (2:286):

Allah does not burden a soul beyond that it can bear. It will have [the consequence of] what [good] it has gained, and it will bear [the consequence of] what [evil] it has earned. Our Lord, do not impose blame upon us if we have forgotten or erred. Our Lord, and lay not upon us a burden like that which You laid upon those before us. Our Lord, and burden us not with that which we cannot bear. And pardon us, and forgive us, and have mercy upon us.

This verse reflects the acknowledgment of human forgetfulness and the plea for Allah’s forgiveness and mercy. While it may not directly address forgetful actions during fasting. The specific rulings regarding fasting and forgetfulness have come from the hadiths of Prophet Muhammad (peace be upon him).

The hadith about eating or drinking forgetfully during fasting is found in Sahih al-Bukhari, Book 23, Hadith 4. The wording may slightly vary among different translations, but the essence remains the same.

If somebody eats or drinks forgetfully, then he should complete his fast, for what he has eaten or drunk has been given to him by Allah. (Sahih al-Bukhari)

The key factor here is forgetfulness. If a person genuinely forgets that they are fasting and eats or drinks, it is considered unintentional, and their fast is still valid. However, if someone eats or drinks intentionally during the fast, then their fast is broken, and they would need to make up for that day and might also be required to offer Kaffara, depending on the circumstances.