بِسْمِ اللَّهِ
Bismillāh
In the name of Allah. (Said before eating suhoor, as before every meal.)
Sahih al-Bukhari 5376
There is no dua for starting the fast in the hadith. What the fast needs is the intention (niyyah), and the intention is in the heart: if you wake for suhoor knowing you will fast tomorrow, you have made it. The popular wording wa bi sawmi ghadin nawaytu min shahri Ramadan is not from the Prophet ﷺ. You may say it if it helps you focus, but it is not required and is not a Sunnah dua.
بِسْمِ اللَّهِ
Bismillāh
In the name of Allah. (Said before eating suhoor, as before every meal.)
Sahih al-Bukhari 5376
وَبِصَوْمِ غَدٍ نَوَيْتُ مِنْ شَهْرِ رَمَضَانَ
Wa bi-ṣawmi ghadin nawaytu min shahri Ramaḍān
I intend to fast tomorrow in the month of Ramadan.
Not found in any hadith collection. A later wording found in some prayer books and calendars
Our teachers will check the Arabic and transliteration on this page before launch.
Guide
There is no dua for starting the fast in the hadith. What the fast needs is the intention (niyyah), and the intention is in the heart: if you wake for suhoor knowing you will fast tomorrow, you have made it. The popular wording wa bi sawmi ghadin nawaytu min shahri Ramadan is not from the Prophet ﷺ. You may say it if it helps you focus, but it is not required and is not a Sunnah dua.
For the Ramadan fast, a vowed fast fixed to a day, and nafl fasts, you may make the intention from sunset the night before until just before the midpoint of the fasting day (half way between Fajr and sunset), as long as you have not eaten. Make a new intention for each day. For make-up (qada) fasts, kaffarah and a vow with no fixed day, the intention must be made before Fajr.
Saying it is not part of the Sunnah. Some later Hanafi and Shafi'i scholars said that saying the intention with the tongue helps the heart focus, while others say it should never be treated as required. All agree that words alone do not count if the heart does not intend, and that the heart's intention is enough without words.
The Prophet ﷺ said: "Eat suhoor, for in suhoor there is blessing."1 He called it the difference between our fasting and the fasting of the People of the Book.2 Delay it towards Fajr: Zayd ibn Thabit said there was about the time of fifty ayat between their suhoor and the prayer.3 More on timing and what to eat is in the suhoor guide, and the rules of the fast are in Ramadan fasting rules. For the end of the day, see the dua for breaking the fast.
The rulings on this page are pending review by the scholars on our team.
Questions
There is no dua for starting the fast in the hadith. Make the intention in your heart, and say Bismillah before eating suhoor.
No. It is a later wording with no source in the hadith collections. You may say it to help you focus, but it is not a Sunnah dua and the fast does not depend on it.
No. The intention is in the heart. Saying it aloud is optional, and the fast is valid without words.
In the Hanafi school, you can still make it during the morning, before the midpoint of the day, as long as you have not eaten or drunk anything. Waking for suhoor also counts as intention.