I had determined to kill you. Thereupon he said: Allah will never give you the power to do it. He (the narrator) said that they (the Companion's of the Holy Prophet) said: Should we not kill her? Thereupon he said: No. He (Anas) said: I felt (the affects of this poison) on the uvula of Allah's Messenger.
Sahih Muslim Book 39, Hadith 59