Musannaf Ibn Abi Shayba 21:679

Yazid ibn Harun narrated to us, he said: Hisham ibn Hassan informed us, from Suhayl ibn Abi Salih, from his father, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever says when he enters the evening three times: 'I seek refuge in the perfect words of Allah from the evil of what He created,' no sting shall harm him that night." Suhayl said: So his family had become accustomed to saying it. Then a woman was stung, and she did not feel any pain from it.