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He said, Do you not see that I say wa alaykum when they say al-saam alaykum? Then he said, If the People of the Book greet you with salaam, say, Wa alaykum. Ibn al-Qayyim (may Allaah have mercy on him) said: if the person is certain that the Dhimmi (Jew or Christian) is clearly saying al-salaamu alaykum to him, and he has no doubts about that, should he say wa alayka al-salaam or shorten it to wa alayk? What is indicated by the evidence and principles of shareeah is that he should say wa alayka al-salaam, because this is more just, and Allaah commands us to be just and to treat others well this does not contradict any of the ahaadeeth on this topic at all, because the Prophet (peace and blessings of Allaah be upon him) commanded us to shorten the greeting to wa alayk because of the reason mentioned above, which is that they deliberately used to say al-saam alaykum instead of al-salaam alaykum, as indicated in the hadeeth narrated by Aaishah (may Allaah be pleased with her). Extended forms include 'Wa alaykumu s-salam wa rahmatullah' ( وعليكم السلام ورحمة الله, May the peace and mercy of Allah be with you too) and 'Wa alaykumu s-salam wa rahmatullahi wa barakatuh' ( وعليكم السلام ورحمة الله وبركاته, May the peace, mercy, and blessings of Allah be with you too). The greeting is regularly exchanged during Muslim lectures and sermons. Salam has been a standard salutation among Muslims.
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The greeting is considered an important Islamic duty and obligation. They are used prior to a conversation and are said to be good manners.
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The greetings are intentional communications to acknowledge someone's presence, or to make someone feel welcomed. It is the standard response to the As-salamu alaykum ( السلام عليكم) greeting. Wa alaykumu as-salam or Wa ‘alaykum al-salaam ( وعليكم السلام) is an Arabic greeting often used by Muslims around the world translating nearly to 'And unto you peace', but is far more than the often used 'hello' or 'good day' in English.
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