Hazrat Sahib (RA) was able to cure many diseases from the prescriptions of Qur'an as it states in the Qur'an:

"And We revealed the Qur'an as a source of purification and blessings for the believers".

This mode of individual prescription was handed out not only to Muslims but also to non-Muslims that used to gather regularly on Sunday surgeries which Hazrat Sahib (RA) held. This meant that Sikhs, Hindus, Christians and Muslims alike would benefit from the spiritual prescription Hazrat Sahib (RA) used to give to them of Zikr of Allah (swt). This was done to the extent that when many non-Muslim's difficulties was overcome, Hazrat Sahib (RA) used to prescribe the continuation of the Zikr for the rest of their lives. This resulted in several hundreds of thousands of Sikh, Hindus and Christians doing Zikr of Allah (swt) according to the prescription of Hazrat Sahib (RA). One day when questioned about this form of da'wah work, Hazrat Sahib (RA) exclaimed that when these person's difficulties are overcome by the Zikr of Allah, I tell them that the Zikr is the basis of blessing in their life. If they wish to continue to receive this blessing, they should continue with this Zikr. After this advise I pray to Allah "Oh Allah, I have helped your creation to overcome their difficulties, with the help of your Zikr Oh Allah, I ask you that I changed their tongues to your Zikr, I ask you to change their hearts so that they can become professed Muslims". It was through such dua's that saw hundred of non-Muslims embrace Islam from various faiths.