It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that a woman in Madinah Munawwarah was bitten by a snake. People called Amr bin Hazm so that he could perform ruqyah (incantation) for her, but he refused. When the Prophet (peace and blessings be upon him) came to know of this, he called Amr. He said, "O Messenger of Allah! You prohibit incantations." The Prophet (peace and blessings be upon him) said, "Recite your incantation before me." He recited it, and the Prophet (peace and blessings be upon him) said, "There is no harm in this; you may perform ruqyah for them."