Narrated Anas bin Malik: A Jewess brought a poisoned (cooked) sheep for the Prophet (ﷺ) who ate from it. She was brought to the Prophet and he was asked, "Shall we kill her?" He said, "No." I continued to see the effect of the poison on the palate of the mouth of Allah's Messenger (ﷺ) .
Sahih al-Bukhari 2617
Why didn't Muhammad execute her? What was her punishment for trying to poison Muhammad?