1-The Notion.2-In Other Religions.3-In Islam.3.1-In Quran.3.2-In Hadith.4-Types of Fasting in Islamic Jurisprudence.5-Rulings.5.1-Intention.5.2-What Invalidate Fasting?.5.3-Disliked Activities during Fasting.5.4-Those Who Are Not Obligated to Fasting.5.5-Drinking in Hardship.5.6-In Polar Regions.5.7-Some Rules.6-Breaking Fast.7-Expiation (Kaffara).8-Levels.9-Philosophy.10-See Also.11-Notes.12-References.