The Jews used to try to sneezes in the presence of the Prophet ﷺ hoping that he would say to them: "Allah have mercy on you!" but he would say: May Allah guide you and grant you well-being!  

كَانَتِ الْيَهُودُ تَعَاطَسُ عِنْدَ النَّبِيِّ ﷺ رَجَاءَ أَنْ يَقُولَ لَهَا يَرْحَمُكُمُ اللَّهُ فَكَانَ يَقُولُ يَهْدِيكُمُ اللَّهُ وَيُصْلِحُ بَالَكُمْ