Why didn't Muhammad execute the Jew who poisoned him?

> 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?