Abd al-Rahim bin Zayd (may Allah have mercy on him) narrates from his father that the Messenger of Allah (peace and blessings be upon him) said: "Do not mention me on three occasions: when eating, when slaughtering, and when sneezing."
This is munqati' (broken); Abd al-Rahim and his father are both da'if (weak), and Sulayman bin Isa al-Sijzi is counted among those who fabricate hadith.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19180