"If anyone of you sneezes, let him say: Alhamdulillah (praise be to Allah). Those around him should respond by saying: Yarhamkullah (may Allah have mercy on you). And he should respond by saying: "Yahdikum Allah wa yuslaha balakum (may Allah Guide you and set right your state)."
قَالَ رَسُولُ اللَّهِ ﷺ إِذَا عَطَسَ أَحَدُكُمْ فَلْيَقُلِ الْحَمْدُ لِلَّهِ وَلْيَرُدَّ عَلَيْهِ مَنْ حَوْلَهُ يَرْحَمُكَ اللَّهُ وَلْيَرُدَّ عَلَيْهِمْ يَهْدِيكُمُ اللَّهُ وَيُصْلِحُ بَالَكُمْ