Fasting: Woke Up Junub at Fajr Without Realising — Is the Fast Valid?

Practical Laws of Islam as per the teachings of Imam Khamenei

Fasting: Woke Up Junub at Fajr Without Realising — Is the Fast Valid?

English:

Question #773:

A person woke up before the morning adhān but did not realise that he was junub and went back to sleep. Later, he woke up during the morning adhān and realized that he has been junub. What is the ruling concerning his fast?

Answer #773:

Before the morning adhān, if he did not realise that he was junub, then his fast is valid.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Fasting