Does one who visits the graves of the righteous and calls upon the grave or makes a vow to it become a disbeliever, or is it necessary to establish the proof against him?

Question:
Honorable Shaykh, may Allah grant you success, he says: Does one who visits the graves of the awliya (close friends of Allah) and the righteous, such as the grave of al-Husayn and others, and calls upon the grave or makes a vow to it, become a disbeliever? And is it necessary to establish the proof against him?

Answer:
Is there any doubt that he becomes a disbeliever? He becomes a disbeliever. If he worships other than Allah, slaughters for other than Allah, makes a vow for other than Allah, or calls for aid from other than Allah, we rule that this is kufr (disbelief), based on his actions and the deeds that have become apparent from him. So we rule against him based on what has become apparent from him. He is not excused among the Muslims; he hears the shirk (associating partners with Allah) and the warnings against shirk. He is not excused; the proof is established against him because he is in the lands of the Muslims and hears the sermons, the exhortations, and the Qur'an warning against shirk. Yes.