Islamic Manners Adab

Adab is prescribed etiquette, a way of living outlined in Islam. 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 the slightest acts, such as entering or exiting a washroom, posture when sitting, and cleansing oneself. According to Sahih Bukhari, Muhammad (peace be upon him), 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."

Kissing children on the mouth

Ruling on kissing daughters or sons on the mouth

Question:
Is it true that a father should not kiss his daughter on the mouth and that a mother should not kiss her son on the mouth?

Answer:

Praise be to Allaah.

This is true. A man should not kiss his mother or daughter on the mouth. Similarly, a brother should not kiss his sister on the mouth, or his paternal aunt or his maternal aunt, or any of his mahrams. Kissing on the mouth is only for husband and wife. And Allaah knows best.

Islam Q&A
Sheikh Muhammed Salih Al-Munajjid