What is the ruling on one who intends to perform i'tikaf (spiritual retreat in the mosque) upon entering the mosque and at any time?

Question : Some people, whenever they enter the mosque, intend to perform i'tikaf. What is the ruling on this action?

Answer : This action is a bid'ah (religious innovation), because it is not reported from the Prophet (peace and blessings be upon him) that they intend to perform i'tikaf in it; rather, he (peace and blessings be upon him) rejected advancing to the mosque on Friday.
He did not inform his Ummah (the Muslim community) that if they advance to the mosque on Friday, they should intend to perform i'tikaf in it. Had this been among the prescribed matters, the Prophet (peace and blessings be upon him) would have explained it to his Ummah, for he (peace and blessings be upon him and his family) did not leave any good without guiding his Ummah to it. What he did not do, it is known that it is not from his Sunnah (recommended practice) or his way. Whoever worships Allah the Exalted with something that is not from the Sunnah of the Prophet (peace and blessings be upon him) or his way, thereby becomes an innovator. The saying of the Prophet (peace and blessings be upon him): "Indeed, ." Thank you, Honorable Shaykh, for the distinction.