In the period of the Asvani Nakshatra [Beta Arietis constellation] you have to take a 4 fingers long bone of a Horse.
Then holding this bone in your hand chant this mantra 108 times; always remembering your enemy.
Then bury this bone in the residence of you enemy.
This will remove that enemy from your life forever.
Om dahadahavan swaha ll
ॐ दहदहवन स्वाहा ll