Black Magic was done on our Prophet, and that's when Surah-e-Falak was brought down.
*1. **Say: "I seek refuge with (Allâh) the Lord of the daybreak,
**2. *"From the evil of what He has created;
*3. *"And from the evil of the darkening (night) as it comes with its darkness; (or the moon as it sets or goes away).
*4. *"And from the evil of the witchcrafts when they blow in the knots,
*5. *"And from the evil of the envier when he envies."
Allah swt tests His people to see who uses it for evil, the translation of the Surah shud be enuff to answer all..