Salam I have come across people who are fasting several days upto 9 days without ever breaking their fast with either water or food for health boosting reasons. I am on such a fast but I am unsure of its benefits since it is not mentioned in the Quran. The God has told us how to fast with specific details. Surely the way of Allah is supreme in all matters. I really need my fellow brothers and sisters opinion in this matter. I have no believer friends. May Allah reward you for any help you wish to offer me. Peace and blessings.
My advice: Read these verses and use your brain. Stop following Humans
But if you ask my opinion, Fasting should be every month, and you are free on how many days you fast, and also not just food drinks sexual intercourse but also talking with people. As we see in Mary she wasnt talking to people when she was fasting
Peace. God knows best
يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ كُتِبَ عَلَيْكُمُ ٱلصِّيَامُ كَمَا كُتِبَ عَلَى ٱلَّذِينَ مِن قَبْلِكُمْ لَعَلَّكُمْ تَتَّقُونَ
O you who heed warning: fasting is prescribed for you: — as it was prescribed for those before you, that you might be in prudent fear —
(2:183)
أَيَّامًا مَّعْدُودَٰتٍ فَمَن كَانَ مِنكُم مَّرِيضًا أَوْ عَلَىٰ سَفَرٍ فَعِدَّةٌ مِّنْ أَيَّامٍ أُخَرَ وَعَلَى ٱلَّذِينَ يُطِيقُونَهُۥ فِدْيَةٌ طَعَامُ مِسْكِينٍ فَمَن تَطَوَّعَ خَيْرًا فَهُوَ خَيْرٌ لَّهُۥ وَأَن تَصُومُوا۟ خَيْرٌ لَّكُمْ إِن كُنتُمْ تَعْلَمُونَ
For days numbered. And whoso among you is sick or on a journey: then a number of other days. And for those who are able to do it is a redemption: feeding a needy person. And whoso does good voluntarily, it is better for him. And that you fast is better for you, if you would know.
(2:184)
شَهْرُ رَمَضَانَ ٱلَّذِىٓ أُنزِلَ فِيهِ ٱلْقُرْءَانُ هُدًى لِّلنَّاسِ وَبَيِّنَـٰتٍ مِّنَ ٱلْهُدَىٰ وَٱلْفُرْقَانِ فَمَن شَهِدَ مِنكُمُ ٱلشَّهْرَ فَلْيَصُمْهُ وَمَن كَانَ مَرِيضًا أَوْ عَلَىٰ سَفَرٍ فَعِدَّةٌ مِّنْ أَيَّامٍ أُخَرَ يُرِيدُ ٱللَّـهُ بِكُمُ ٱلْيُسْرَ وَلَا يُرِيدُ بِكُمُ ٱلْعُسْرَ وَلِتُكْمِلُوا۟ ٱلْعِدَّةَ وَلِتُكَبِّرُوا۟ ٱللَّـهَ عَلَىٰ مَا هَدَىٰكُمْ وَلَعَلَّكُمْ تَشْكُرُونَ
A moon of scorching heat was that in which the Qur’an was sent down, a guidance for mankind, and clear signs of the guidance and the Division[...]. So whoso among you witnesses the moon, let him fast in it. And whoso of you is sick or on a journey: then a number of other days. God desires for you ease, and He desires not for you hardship; but that you complete the number; and that you magnify God for guiding you; and that you might be grateful.
(2:185)
أُحِلَّ لَكُمْ لَيْلَةَ ٱلصِّيَامِ ٱلرَّفَثُ إِلَىٰ نِسَآئِكُمْ هُنَّ لِبَاسٌ لَّكُمْ وَأَنتُمْ لِبَاسٌ لَّهُنَّ عَلِمَ ٱللَّـهُ أَنَّكُمْ كُنتُمْ تَخْتَانُونَ أَنفُسَكُمْ فَتَابَ عَلَيْكُمْ وَعَفَا عَنكُمْ فَٱلْـَٔـٰنَ بَـٰشِرُوهُنَّ وَٱبْتَغُوا۟ مَا كَتَبَ ٱللَّـهُ لَكُمْ وَكُلُوا۟ وَٱشْرَبُوا۟ حَتَّىٰ يَتَبَيَّنَ لَكُمُ ٱلْخَيْطُ ٱلْأَبْيَضُ مِنَ ٱلْخَيْطِ ٱلْأَسْوَدِ مِنَ ٱلْفَجْرِ ثُمَّ أَتِمُّوا۟ ٱلصِّيَامَ إِلَى ٱلَّيْلِ وَلَا تُبَـٰشِرُوهُنَّ وَأَنتُمْ عَـٰكِفُونَ فِى ٱلْمَسَـٰجِدِ تِلْكَ حُدُودُ ٱللَّـهِ فَلَا تَقْرَبُوهَا كَذَٰلِكَ يُبَيِّنُ ٱللَّـهُ ءَايَـٰتِهِۦ لِلنَّاسِ لَعَلَّهُمْ يَتَّقُونَ
It is made lawful for you on the night of the fast to go in unto your women. They are a covering for you, and you are a covering for them. God knows that you deceived yourselves, so He turned towards you and pardoned you; so now lie with them and seek what God has prescribed for you. And eat and drink until clear to you be the white thread from the black thread of the dawn. Then complete the fast until night. And lie with them not when you remain in the places of worship. Those are the limits of God, so approach them not. Thus does God make plain His proofs to men, that they might be in prudent fear.
(2:187)
فَكُلِى وَٱشْرَبِى وَقَرِّى عَيْنًا فَإِمَّا تَرَيِنَّ مِنَ ٱلْبَشَرِ أَحَدًا فَقُولِىٓ إِنِّى نَذَرْتُ لِلرَّحْمَـٰنِ صَوْمًا فَلَنْ أُكَلِّمَ ٱلْيَوْمَ إِنسِيًّا
“So eat thou, and drink thou, and let thine eye be comforted; and if thou see any mortal, say thou: ‘I have vowed to the Almighty a fast, so I will not speak this day to any man.’”
(19:26)
