We proceeded from the Messenger of Allah ﷺ and came to a clan of the Arabs. They said: We have been told that you have brought what is good from this man. Have you any medicine or a charm, for we have a lunatic in chains? We said: Yes. Then they brought a lunatic in chains. He said: I recited Surat al-Fatihah over him for three days, morning and evening. Whenever I finished it, I would collect my saliva and spit it out, and he seemed as if he were set free from a bond. He said: They gave me some payment, but I said: No, not until I ask the Messenger of Allah ﷺ. He (the Prophet) said: Accept it, for, by my life, some accept it for a worthless charm, but you have done so for a genuine one. (Using translation from Abū Dāʾūd 3901)   

أَقْبَلْنَا مِنْ عِنْدِ النَّبِيِّ ﷺ فَأَتَيْنَا عَلَى حَيٍّ مِنْ أَحْيَاءِ الْعَرَبِ فَقَالُوا هَلْ عِنْدَكُمْ دَوَاءٌ أَوْ رُقْيَةٌ؟ فَإِنَّ عِنْدَنَا مَعْتُوهًا فِي الْقُيُودِ فَجَاءُوا بِمَعْتُوهٍ فِي الْقُيُودِ فَقَرَأْتُ عَلَيْهِ بِفَاتِحَةِ الْكِتَابِ ثَلَاثَةَ أَيَّامٍ غُدْوَةً وَعَشِيَّةً أُجَمِّعُ بُزَاقِي ثُمَّ أَتْفُلُ وَكَأَنَّمَا نَشِطَ مِنْ عِقَالٍ فَأَعْطَوْنِي جُعْلًا فَقُلْتُ لَا فَقَالُوا سَلِ النَّبِيَّ ﷺ فَسَأَلْتُهُ فَقَالَ «كُلْ فَلَعَمْرِي مَنْ أَكَلَ بِرُقْيَةِ بَاطِلٍ فَقَدْ أَكَلَتْ بِرُقْيَةِ حَقٍّ»  

[Machine] I witnessed the Battle of Khaybar with my leaders, and they spoke to me about the Messenger of Allah ﷺ and informed him that I was a slave. So he ordered me, and I copied the sword. Then, suddenly, I felt its weight. He ordered me to bring some of the spoils of war, and I presented him with a piece of cloth that I used to treat mental illnesses. He commanded me to discard some of it and keep some of it.  

شَهِدْتُ خَيْبَرَ مَعَ سَادَتِي فَكَلَّمُوا فِيَّ رَسُولَ اللهِ ﷺ وَأَخْبَرُوهُ أَنِّي مَمْلُوكٌ فَأَمَرَنِي فَقُلِّدْتُ السَّيْفَ فَإِذَا أَنَا أَجُرُّهُ فَأَمَرَ لِي بِشَيْءٍ مِنْ خُرْثِيِّ الْمَتَاعِ قَالَ «وَعَرَضْتُ عَلَيْهِ رُقْيَةً كُنْتُ أَرْقِي بِهَا الْمَجَانِينَ فَأَمَرَنِي بِطَرْحِ بَعْضِهَا وَحَبْسِ بَعْضِهَا»