It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them) that he said: Sayyiduna Umar (may Allah be pleased with him) sought permission to go to the Prophet (peace and blessings of Allah be upon him) and said: «السلام علی رسول الله، السلام علیکم», Can Umar come in?
Hadith Referenceالادب المفرد / كتاب الاستئذان / 1085
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه أبوداؤد ، كتاب الأدب : 5201 و النسائي فى الكبرىٰ : 10153»
Explanation & Benefits
Shaykh Maulana Usman Muneeb
Benefits and Issues: One should give the greeting of salam first, and thereafter introduce oneself, such as by asking whether so-and-so is permitted to enter. Similarly, it is permissible to give a special salam to the caliph or any important personality, and then to give salam to all the people.
Source: Fadlullah al-Ahad: Urdu Commentary on al-Adab al-Mufrad, Page: 1085