In what follows, there are additional guidelines that should be taken into consideration what performing a ruqyah.
1. Adhering to What Is Reported in the Sunnah
Ruqyahh is a form of supplication. As is the case with other supplications, it is permissible to use any words that fulfill the above conditions. This is approved by Allah's Messenger (Peace and Blessing upon Him) who said:
‘There is nothing wrong with ruqya as long as they do not involve shirk.’
Ruqyah with Allah's Name
Abu Sa'id al-Khudri (RA) reported that Jibril came to the Prophet (Peace and Blessing upon Him) and said:, "O Muhammad, are you sick?" He replied, 'Yes.' He said:
"Bismillahi arqik, min kulli shayin yuthik, min sharri kulli nafsin aw ayni hasid - With Allah's Name I shelter you (give you ruqyah), from all that ails you, from the evil of every soul, or that of the envious eyes. May Allah cure you; with Allah's Name I shelter you." Muslim and others.
Ruqyah with Allah's Book
'Aishah (RA) reported that Allah's Messenger (Peace and Blessing upon Him) came into her house and saw with her a woman who was treating her with ruqyah. He told her:
'Treat her (only) with Allah's Book.' Recorded by Ibn Hibban; verified to be authentic by al-Albani in as-Sahihah no. 1931.
In what follows, we present ruqa with specific suras or ayat as is recorded in the Sunnah.
So any verse from the Quran can be recited but certain verses are more effective (eg. Ayat Al Kursi) or have certain virtues (2:102 and other sihr verses) or surah fathiha which can be read to cure evil eye and poison.
Ruqyah with al-Fatiha
Abu Sa'id al-Khudri and Ibn Abbas (RA) reported that a number of the Prophet's (Peace and Blessing upon Him) companions were on a journey. They stopped one night by the dwellings of a bedouin tribe who refused to host them and give them food.
The chief of that tribe was then stung (by a snake or scorpion). His people tried everything possible to treat him, but to no avail. One of them suggested to seek help from the travellers. When they came to them, one of them said, "By Allah, I can perform ruqyah; but you have refused to host us. So I would not perform the ruqyah until you pledge to give us an offering."
They agreed to give them a flock of thirty sheep, and the companion started blowing (with light spit) on the stung man's sting and reading al-Fatiha. He was immediately cured, like one who was tied and then set free. He stood and walked as if nothing happened to him, and they gave them their pledged offering.
Some of the companions said, "Let us divide this flock among us." Others said, "No, you may not take any pay for reading Allah's Book! Let us not divide the goats until we reach the Prophet (Peace and Blessing upon Him), tell him what happened, and see what he commands us."
When they reached al-Madinah, they came to the Prophet (Peace and Blessing upon Him) and told him what happened. He said (approvingly):
'How did you know that it (al-Fatiha) is a ruqyah? You have done well! And indeed, the best thing to be paid for is Allah's Book*. So, divide it among you; and allot a share for me.' Al-Bukhari, Muslim, and others.