وَٱلْفُرْقَانِ ۚ فَمَن شَهِدَ مِنكُمُ ٱلشَّهْرَ فَلْيَصُمْهُ ۖ وَمَن كَانَ مَرِيضًا أَوْ عَلَىٰ سَفَرٍ فَعِدَّةٌ مِّنْ أَيَّامٍ أُخَرَ ۗ يُرِيدُ ٱللَّهُ بِكُمُ ٱلْيُسْرَ وَلَا يُرِيدُ بِكُمُ ٱلْعُسْرَ وَلِتُكْمِلُوا۟ ٱلْعِدَّةَ وَلِتُكَبِّرُوا۟ ٱللَّهَ عَلَىٰ مَا هَدَىٰكُمْ وَلَعَلَّكُمْ تَشْكُرُونَ
The month of Ramazan[is that] in which was revealed the Qur’an, a guidance for the people and clear proofs of guidance and criterion. So whoever sights [the new moon of] the month, let him fast it; and whoever is ill or on a journey – then an equal number of other days. Allah intends for you ease and does not intend for you hardship and [wants] for you to complete the period and to glorify Allah for that [to] which He has guided you; and perhaps you will be grateful.
Surah Baqarah Ayat 185.

Hz. Abu Huraira reported: The Messenger of Allah ^PBUH said:
‏إِذَا دَخَلَ شَهْرُ رَمَضَانَ فُتِّحَتْ أَبْوَابُ السَّمَاءِ وَغُلِّقَتْ أَبْوَابُ جَهَنَّمَ وَسُلْسِلَتِ الشَّيَاطِين‏
When the month of Ramadan begins, the gates of the heaven are opened, the gates of Hellfire are closed, and the devils are chained.
Source: Ṣaḥīḥ al-Bukhārī

Hazrath Imam Mahdi ^PBUH is narrated to have said that-He who trusts on bread,is not a mutawakkil (one who trusts in Allah),because Allah has already given a promise about bread.Allah says in Quran There is nothing that moveth,the nourishment of which does not depend on Allah….35 This is a promise of Allah.If you have Iman (faith) on the promise of Allah,you are a mumin (believer);otherwise,you are a kafir (infidel).If somebody promises that he would host you as his guest today,you trust him and remain hungry and eat nothing.But it is Allah’s promise,and He is Sadiq-al-wa’d ) always true to his promise).

Hazrath Ali Ul Murtuza ^Rz. said that -“Patience is to faith what the head is to the body. When patience goes, faith goes [and] when the head goes, the body goes.”