The Messenger of Allah ﷺ said, "A sneezer is to be blessed three times. Beyond that, he has a cold."
حدثنا علي بن محمد حدثنا وكيع عن عكرمة بن عمار
قال رسول الله ﷺ يشمت العاطس ثلاثا فما زاد فهو مزكوم
No references are available.
Muslim narrated it, in the previous chapter on zuhd, hadith no. 55/2993, from the hadith of Waki with different wording than this, and Ibn Hajar said regarding this narration that it is shaadh (anomalous).