Usama b. Zaid reported God's messenger as saying, "Let him who falsely attributes to me things I have not said come to his seat in hell." That was because a man he had sent on an errand had told lies about him. God's messenger therefore invoked a curse on him and he was found dead with his belly split, and the earth would not accept him.
Baihaqi transmitted the two traditions in Dala'il an-Nubuwa.