Whoever recites this three times in the evening will be protected from insect stings, Ahmad 2/ 290, An-Nasa'i, 'Amalul-Yawm wal-Laylah no. 590, At-Tirmidhi 3/187, Ibn As-Sunni no. 68. According to Al-Albani, Ibn Majah's (2/266) chain of transmission is sound (Sahih), and following Ibn Baz 45, At-Tirmidhi's report is good (Hasan).