The ruling on one who introduces into the religion matters that are not part of the religion

Question:
May Allah reward you, Honorable Shaykh, and may He bless you. This questioner says: Honorable Shaykh, what is the ruling on one who introduces into the religion things that are not part of it? Some people claim that they love this religion and love the Messenger, yet they bring forth deeds that contradict the Prophetic guidance and the guidance of the Messenger (peace and blessings be upon him).

Answer:
Allah, Glorified and Exalted is He, completed the religion for us before the death of the Messenger (peace and blessings be upon him). He said, Mighty and Majestic: The Prophet (peace and blessings be upon him) did not pass away until Allah had completed the religion through him. There is no room for addition after him (peace and blessings be upon him). So whoever brings forth a form of worship that the Messenger (peace and blessings be upon him) did not bring, and thinks that it brings him closer to Allah, it is a bid'ah (religious innovation) and misguidance, and it distances him from Allah. For this reason, Imam Malik said: “No one introduces a bid'ah (religious innovation) except that he has accused Allah, Mighty and Majestic, in His religion,” meaning that He did not complete the religion, or something to that effect. And the Prophet (peace and blessings be upon him) warned against bid'ah (religious innovations) and newly invented matters. He said (peace and blessings be upon him): He said (peace and blessings be upon him): meaning it is rejected from him.
And in a narration: “Whoever does a deed for which there is no command from us, it is rejected,” meaning it is rejected from him, and Allah does not accept it, because Allah, Mighty and Majestic, does not accept except what He has prescribed, and He does not accept what the innovator has prescribed, or what he brought from himself. Yes.