Sayyiduna Abu Ayyub Ansari (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: When any one of you sneezes and says "Alhamdulillah ‘ala kulli hal" (All praise is due to Allah in every circumstance), then the one who replies to him should say: "Yarhamukallah" (May Allah have mercy on you), and in response to this, the one who sneezed should then say: (May Allah guide you and rectify your condition).