What happens if someone did not reply to another person’s salam?
Answer:
In the Name of Allah, the Most Gracious, the Most Merciful.
It is wajib (compulsory) to reply to the salam of a Muslim. If a person did not reply to the salam of a Muslim, he has committed a sin and, therefore, he must do tauba.
( قوله وردّ السلام وتشميت العاطس على الفور ) ظاهره أنه إذا أخّره لغير عذر كره تحريما ولا يرتفع الإثم بالرد بل بالتوبة ط ( رد المحتار: 6/414 ، سعيد )
And Allah knows best.
Mufti Faizal Riza
29/5/2012