Abu Hurairah narrated:
"The Messenger of Allah (s.a.w) forbade from cures that are Khabith." [Abu 'Elsa said:] Meaning poison (RU)
English reference (RU): Vol. 4, Book 2, Hadith 2045 (RU)
Arabic reference (RU): Book 28, Hadith 2181 (RU)