The Messenger of Allah ﷺ said: “If one of you sneezes, let him say, Praise be to Allah the Lord of the Worlds, and let those who are around him say: May Allah have mercy on you, and let him say, May Allah guide you and rectify your condition.” (Using translation from Aḥmad 972)   

قَالَ رَسُولُ اللهِ ﷺ إِذَا عَطَسَ أَحَدُكُمْ فَلْيَقُلِ الْحَمْدُ لِلَّهِ وَلْيَقُلْ لَهُ أَخُوهُ أَوْ صَاحِبُهُ يَرْحَمُكَ اللهُ وَلْيَقُلْ يَهْدِيكُمُ اللهُ وَيُصْلِحُ بَالَكُمْ