The ruling on moving the index finger during the tashahhud and its effect on Satan

Question:
The listener Sulayman 'Abd al-Hamid San'an from Damascus sent a message containing two questions. In his first question, he says: I read in one of the books that the Messenger (peace and blessings be upon him) used to move his index finger during the tashahhud. It says that it is more severe for Satan than iron. So please clarify this for us. May Allah reward you with good.

Answer:
Raising the index finger during the tashahhud and pointing with it when shaking off the jinn or when making du'a' is a sunnah (recommended practice) established from the Prophet (peace and blessings be upon him). He (peace and blessings be upon him) would clasp the little finger and the ring finger, curl the middle finger with the thumb, and raise the index finger to point with it. As for it being more severe for Satan than such-and-such, I do not know this to be reported from the Prophet (peace and blessings be upon him).