Reference: Sharh Buloogh al-Maraam – v1, p476
Shaykh Ibn ‘Uthaymeen said:
Do not fear the supplication of the one who supplicates against you without [any] right [to do so].
That is because the One who responds to the supplication is Allaah عز و جل, and He سبحانه و تعالى does not grant victory to the oppressor, ever.
