Book Name:Shair-e-Khuda Kay Roshan Faislay
1. It is Sunnah to say Salam when meeting a Muslim.
Ninety mercies descend upon the one who takes the lead in Salam and ten mercies descend upon the one who replies. (Kimiya-e-Sa’adat)
One receives 10 virtues for saying (اَلسَّلَامُ عَلَیْـکُمْ), 20 virtues if ﴿وَ رَحْمَۃُ اللّٰہِ﴾ is further added, 30 if ﴿وَ بَرَکَاتُہٗ﴾ is also added.
The person who takes the lead in saying Salam is free from arrogance.
The person one who takes the lead in saying Salam is close to Allah عَزَّوَجَلَّ.
The best words of Salam are (اَلسَّلَامُ عَلَیْـکُمُ وَ رَحْمَۃُ اللّٰہِ وَ بَرَکَاتُہٗ) i.e., may peace be upon you, and mercies and blessings descend from Allah عَزَّوَجَلَّ. (Derived from: Fatawa Razawiyyah, vol. 22, pp. 409)
The best words for the reply to Salam are as follows ﴿وَعَلَیْـکُمُ السَّلَامُ وَ رَحْمَۃُ اللّٰہِ وَ بَرَکَاتُہٗ﴾ i.e., and may peace be upon you too, and mercies and blessings descend from Allah عَزَّوَجَلَّ. (Derived from: Fatawa Razawiyyah, vol. 22, pp. 409)
It is Wajib [obligatory] to reply to Salam immediately in a voice audible to the one who greeted you with Salam.
To learn various Sunan, obtain the following books, Bahar-e-Shari’ah part 16 comprising of 312 pages and Sunnatayn aur Adaab, comprising of 120 pages, both published by Maktaba-tul-Madinah, the publishing department of Dawat-e-Islami. One of the best ways to learn Sunan is to travel in the Madani Qafilahs of Dawat-e-Islami with the lovers of the Beloved Rasool.
عاشقانِ رسول، آئیں سنّت کے پھول
دینے لینے چلیں، قافلے میں چلو
[صَلُّوۡا عَلَى الۡحَبِيۡب صَلَّى اللّٰهُ تَعَالٰى عَلٰى مُحَمَّد