Generally speaking, a Muslim has to believe that Allah is the one Who sustains him/her, and He is only the One Who could harm or benefit him/her. No human, jinn, or even angel could harm anybody without Allah’s will. There are many Qur’anic verses and hadiths prove this fact. For example, Almighty Allah says, “Say: I have no power to hurt or benefit myself, save that which Allah wills…” (Yunus: 49)

Also, the Prophet (peace and blessings be upon him) is reported to have said, “Be mindful of Allah, and you will find Him in front of you. If you ask, ask of Allah; if you seek help, seek help of Allah. Know that if the Nation were to gather together to benefit you with anything, it would benefit you only with something that Allah had already prescribed for you, and that if they gather together to harm you with anything, they would harm you only with something Allah had already prescribed for you…” (Reported by At-Tirmidhi)

No one could cause the death of another before the latter’s actual time of death—that no one knows except Allah Almighty. In Surat Al `Imran, the Qur’an makes this fact clear when we read, “And no person can ever die except by Allah’s leave and at an appointed term.” (Al `Imran 3: 145)

Commenting on the above Qur’anic verse, Ibn Kathir states in his well-known Tafseer, “the verse means that no one dies except by Allah’s decision, after he has finished the term that Allah has destined for him. This is why Allah said,at an appointed term“, which is similar to His statements…, “He it is Who has created you from clay, and then has decreed a (stated) term (for you to die). And there is with Him another determined term (for you to be resurrected.” (Al-An`am 6:2)

Given the above, it becomes clear that evil eye or black magic cannot cause a person to die without Allah’s will and decree.

Now, let’s deal with the issue of evil eye and black magic and how a Muslim can protect himself against these evils.

Regarding the evil eye, it is to be stated that the effect of an evil eye is a fact. This is supported by many proofs from revealed texts and reasoning. Imam al-Bukhari reported on the authority of Abu Hurayrah that the Prophet (peace and blessings be upon him) said, “The effect of an evil eye is a fact.” (al-Bukhari and Muslim)
However, the evil eye can never harm unless Allah wills so. Hence, it shouldn’t be a cause of fear or terror to anyone, for supreme power and might are for Almighty Allah alone and He is the Only One we should fear. It is in Him that we should seek protection against Satan and the evil eye. Both al-Bukhari and Muslim reported in their authentic collections that `A’ishah (may Allah be pleased with her) said: “The Messenger of Allah (peace and blessings be upon him) used to tell me to recite ruqyah for protection against the evil eye.”

For more information regarding protection against evil eye, read the following fatwa:

Islamic Cure for Evil Eye

As for black magic, your best protection and immunity against black magic is by empowering yourself through practicing Islam, reading the Qur’an and consistency in Dhikr and Du’a.

Allah has promised the faithful that devils cannot exercise permanent control over those servants of Allah who have submitted to Him; Satan can exercise permanent control only over those who acquiesce and surrender themselves to his authority. “Most certainly, My servants–you cannot exercise control over them except those who are deviant who follow you.” (Al-Hijr 15: 42) “Most certainly he (Satan) has no power over those who truly cherish faith and are trusting upon their Lord; rather his power is limited only to those who take him as a protector (beside God) and thus associate partners with Him” (An-Nahl 16: 99-100).