Explanation

Sneezing is considered a sign of good health and a blessing from Allah. When a person sneezes and acknowledges this blessing by saying Alhamdulillah (All praise is for Allah), it becomes a right (haq) for the person who hears it to respond with Yarhamukallah (May Allah have mercy on you). This beautiful exchange turns a simple biological reflex into an act of worship and brotherhood. It strengthens the bond between Muslims, reminding them that every breath and bodily function is under Allah's control and that they should always invoke mercy for one another.

Is there a Quranic Or Hadith reference?

Yes, this is based on a clear command from the Prophet Muhammad (PBUH). It is narrated in Sahih Bukhari (Hadith 6224):

"The Prophet (PBUH) said: 'It is a right of a Muslim upon his brother that when he sneezes and praises Allah (says Alhamdulillah), he should say Yarhamukallah (May Allah have mercy on you).'"

Summary

(English) When someone sneezes and says Alhamdulillah, responding with Yarhamukallah is a Sunnah that fosters love and compassion. This practice serves as a constant reminder to acknowledge Allah's favors and to pray for the well-being of others. It transforms a routine reflex into a communal act of prayer, ensuring that even in small moments, Muslims invoke Allah's mercy for one another.

(Hinglish) Jab koi cheenkne ke baad Alhamdulillah kahe, toh sunne wale ke liye Yarhamukallah kehna ek ahem haq aur sunnat hai. Yeh dua hamare rishton mein mohabbat badhati hai aur hamein yaad dilati hai ki har haal mein Allah ka shukr ada karna chahiye. Is chote se amal ke zariye hum ek dusre ke liye Allah ki raham ki dua karte hain, jo hamare beech bhai-chare ko mazboot karta hai.

Agar koi cheenkne wala Alhamdulillah kehna bhool jaye, toh kya humein phir bhi Yarhamukallah kehna chahiye?