As for a person struck by magic the following steps are recommended:
Reading Quran and known supplications expressing seeking refuge, the most important and effective of which is following:
- Sura 113 and 114, Al-Falaq and Al-Naas, which were used to cure the Prophet himself. Surah 112, Al-Ikhlaas, is recommended along with them, as well as the opening chapter of the Quraan, Al-Fatihah.
- To cure black magic some have successfully used seven lote-tree leaves. The leaves should be crushed, then mixed them with water enough for taking a bath. The following verses from the Quraan are then recited: verse Al-Kursi (2:255), surah Al-Kafiroon (109), surah 112, 113, 114; the verses which mention magic, which are: in surah Al-Baqarah (2:102), Al-Araaf (7:117-119), Yunus (10:79-82), and Taha (20:65-69). The possessed person drinks some of the water, and the rest is used to give him a bath.
- Removing the elements of magic as was done by the Prophet when he was struck by black magic by a Jewish man called Lubaid Ben Al-Aasim.
- Eating seven Aaliya Al-Barniy dates (among the dates of Al-Madinah) first thing in the morning; if not possible, any dates will suffice, by the will of Allaah.
In the event that you are afflicted by the evil eye, you should use the treatments recommended in sharee’ah, which are:
1 – Reciting ruqyah. The Prophet (peace and blessings of Allah be upon him) said, “There is no ruqyah except in the case of the evil eye or fever.” al-Tirmidhi, Abu Dawood. Jibril (peace be upon him) used to do ruqyah for the Prophet (peace and blessings of Allah be upon him) and say, “Bismillahi arqeeka min kulli shayin yudheeka, min sharri kulli nafsin aw ‘aynin hasid Allaahu yashfeek, bismillahi arqeek (In the name of Allah I perform ruqyah for you, from everything that is harming you, from the evil of every soul or envious eye may Allah heal you, in the name of Allah I perform ruqyah for you).”
2 – Asking the person who has put the evil eye on another to wash, as the Prophet (peace and blessings of Allah be upon him) commanded ‘Amir ibn Rabee’ah to do in the hadeeth quoted above. Then the water should be poured over the one who has been afflicted.
The Prophet (peace and blessings of Allah be upon him) used to seek refuge for al-Hasan and al-Husayn and say: U’eedhukuma bi kalimat Allah al-tammati min kulli shaytanin wa hammah wa min kulli ‘aynin lammah (I seek refuge for you both in the perfect words of Allah, from every devil and every poisonous reptile, and from every evil eye).’” Al-Tirmidhi, Abu Dawood. And he would say, “Thus Ibrahim used to seek refuge with Allah for Ishaq and Ismail, peace be upon them both.” [al-Bukhaari].
With regard to the hadeeth that you mention, “One third of those who are in the grave are there because of the evil eye,” we do not know how sound it is, but the author of Nayl al-Awtar said that al-Bazzar narrated with a hasan isnad (sound chain of narrators) from Jabir (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: “Most of those who die among my ummah (followers) die because of the will and decree of Allah, and then because of the evil eye.”
The Muslim has to protect himself against the devils among the evil jinn and mankind, by having strong faith in Allah and by putting his trust in Him and seeking refuge with Him and beseeching Him, reciting the prayers for protection narrated from the Prophet (peace and blessings of Allah be upon him), reciting al-Mu’awwadhatayn [the last two surahs of the Quran], Surat al-Ikhlas, Surat al-Fatihah, and ayat al-Kursi.
Du’as for protection include the following:
A’oodhu bi kalimat-illah il-tammati min sharri ma khalaqa (I seek refuge in the perfect words of Allah from the evil of that which He has created).
A’oodhu bi kalimat-illah il-tammati min ghadabihi wa ‘iqabihi, wa min sharri ‘ibadihi wa min hamazat al-shayateeni wa an yahduroon (I seek refuge in the perfect words of Allah from His wrath and punishment, from the evil of His slaves and from the evil promptings of the devils and from their presence).
And one may recite the words of Allah:
“Hasbi Allahu la ilaha illa huwa, ‘alayhi tawakkaltu wa huwa Rabb ul-‘arsh il-‘azeem
(Allaah is sufficient for me. La ilaha illa Huwa (none has the right to be worshipped but He) in Him I put my trust and He is the Lord of the Mighty Throne).”[9:129 – interpretation of the meaning]
There are means of protecting oneself against the dangers of witchcraft before it happens, the most important and beneficial of which is protecting oneself by reciting the dhikrs, du’as (supplications) and prayers for protection that are prescribed in sharee’ah, such as reciting Ayat al-Kursiy (a verse in the second chapter) after every obligatory prayer, after the dhikrs that are prescribed after the salam (conclusion of prayer). It may also be recited when going to sleep. Quran [2:255]
One may also recite Qul Huwa Allahu ahad, Qul ‘Aoodhu bi Rabb il-Falaq and Qul ‘a’oodhu bi Rabb il-nas (i.e., the last three chapters of the Quran) following every obligatory prayer, and recite these three chapters three times at the beginning of the day, after Fajr (early morning) prayer, and at the beginning of the night, after Maghrib (sunset).
Another dhikr is to recite the last two verses of Surat al-Baqarah at the beginning of the night.
At the beginning of the day and at the beginning of the night, the Muslim should say three times: “Bismillah illathi la yadurru ma’a ismihi shay’un fi’l-ard wa la fi’l-sama’ wa huwa al-samee’ ul-‘aleem (In the name of Allah with Whose name nothing is harmed on earth nor in heaven, and He is the All-Hearing, All-Knowing)” because it is narrated in a saheeh report that the Messenger of Allah (peace and blessings of Allah be upon him) encouraged that, and that is a means a protection against all evil.
NOTE:
Important for prayer to be accepted is Putting ones trust in Allah with sincere belief that He is the only cure for everything.