Ayesha reported,

The Prophet ﷺ would spend the night in a state of major ritual impurity. Bilal would come to him and call him to the prayer. He would rise and perform the full bath, and I could see the water flowing down from his head. Then he would go out, and I would hear his voice in the dawn prayer.Mutarrif said, I asked Amir, "Was this during Ramadan?"He replied, "Ramadan and other times are the same."

Azami 4573

Sahih

عن عائشة قالت

كان النبي ﷺ يبيت جنبا، فيأتيه بلال، فيؤذنه بالصلاة فيقوم فيغتسل فأنظر إلى تحدر الماء من رأسه، ثم يخرج، فأسمع صوته في صلاة الفجر. قال مطرف: فقلت لعامر: أفي رمضان؟ قال: رمضان وغيره سواء.

الأعظمي 4573صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Fasting
Chapter
What is permitted and what is not permitted for the fasting person
Section
Validity of fasting for one who reaches dawn while in a state of janabah
Numbering
Jami al-Kamil 4573 (2nd edition)
Azami 4573