Q: Two people are entering a house. The first person who enters says assalaamu alaykum. Should the second person who enters say wa alaykumus salaam, in response to the first persons salaam or should they say assalaamu alaykum as we learn is the etiquettes of entering a house??
A: Making salaam at the time of entering is an adab, and answering a salaam is waajib. You may do both.
And Allah Ta’ala (الله تعالى) knows best.
Mufti Ebrahim Salejee (Isipingo Beach)