When one Sneezes and Praises Allah
The Prophet (sal Allahu alaihi wa sallam) said, “When one of you sneezes and praises Allah (i.e., says Al-hamdu lillah), you should invoke Allah’s Mercy upon him (i.e., say Yarhamuk-Allah); but if he does not praise Allah, you should not make a response.”
[Sahih Muslim]
Commentary:
We benefit from this Hadith that we should only say ‘Yarhamuk-Allah’ to that sneezer who says ‘Al-hamdu lillah’ after sneezing.
And Allah knows best!