Adab, in the context of behavior, refers to prescribed Islamic etiquette: "refinement, good manners, morals, decorum, decency, humaneness". While interpretation of the scope and particulars of Adab may vary among different cultures, common among these interpretations is regard for personal standing through the observation of certain codes of behavior. To exhibit Adab would be to show "proper discrimination of correct order, behavior, and taste."

Islam has rules of etiquette and an ethical code involving every aspect of life. Muslims refer to Adab as good manners, courtesy, respect, and appropriateness, covering acts such as entering or exiting a washroom, posture when sitting, and cleansing oneself. According to Sahih Bukhari, Muhammad refrained from bad language; neither a 'Fahish nor a Mutafahish. He used to say "The best amongst you are those who have the best manners and character."

Sunni hadith:

Shi'a hadith:

A narration attributed to Muhammad reports:

The sunni Ahadith are those collections by Imam Maliki;Shafiyi;Bukhari;Muslim and analogical reasoning of the ulama.These ,thus are authentic sources of the sayings and deeds of the prophet of Islam:Muhammadu Rasulullah[SAW]

Adab can refer to:

Abu Ameenah Bilal Philips (born Dennis Bradley Philips on 6 January 1946 in Jamaica) is a contemporary Islamic scholar, teacher, speaker, and author, resident in Qatar. He appears on Peace TV, which is a 24-hour Islamic satellite TV channel broadcasting to many countries around the world.

Philips was born on 6 January 1946 in Jamaica, but grew up in Canada, where he converted to Islam in 1972. He received his B.A. degree from the Islamic University of Medina and his M.A. in Aqeedah (Islamic Theology) from the King Saud University in Riyadh, then to the University of Wales, where he completed a PhD in Islamic Theology in the early 1990s. Philips comes from a family of educators, as both his parents were teachers and his grandfather was a Christian minister and Bible scholar.

In 1994 he founded (and continues to direct) an Islamic Information Center, now known as Discover Islam, in Dubai, United Arab Emirates.

The Islamic Online University has been founded by Dr. Bilal Philips as a completely tuition-free institution that is offering an online intensive, undergraduate, and graduate courses in Islamic Studies. The university offers a four year bachelor of arts degree in Islamic studies program.