Is it permissible to break one's fast after sleeping through the Maghrib prayer and waking up for the Fajr prayer, without having eaten anything since the previous day?

Fasting is one of the pillars of Islam, and a Muslim must be patient with it and seek Allah's help. It is permissible to drink water or rinse the mouth for cooling. A fasting person must begin their day fasting. If they are unable to complete it and fear perishing or illness, they are permitted to break their fast, not merely based on a delusion, but after hardship has occurred. Whoever fears perishing from severe hunger or thirst may break their fast, due to Allah’s saying: "And do not kill yourselves" (Quran 4:29) and "And do not throw yourselves with your own hands into destruction" (Quran 2:195). The day on which one broke the fast must be made up, and repentance is required if the breaking of the fast occurred before the permissible hardship arose.