Musannaf Ibn Abi Shaybah

Hazrat Nu’man bin Salim narrates that a man sneezed in the presence of Hazrat Abdullah bin Amr (may Allah be pleased with him), so he supplicated for him by saying “Yarhamukallah” (may Allah have mercy on you). Then the man sneezed again, and he again said “Yarhamukallah.” When the man sneezed a third time, he said: “Surely, you are suffering from a cold.”