Sayyiduna Sahl bin Hunaif (may Allah be pleased with him) narrates that we passed by a water pond, I entered it and bathed with that water. When I came out, I was feverish. When the Prophet (peace and blessings be upon him) came to know of this, he said: Tell Abu Thabit Sahl bin Hunaif to seek refuge with Allah Almighty. I said: O my master! Is it permissible to perform ruqyah (spiritual healing)? The Prophet (peace and blessings be upon him) said: Ruqyah should only be done when afflicted by the evil eye or bitten by a poisonous thing.