Do we declare a disbeliever the one who prostrates to an idol, or slaughters for a grave?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: Do we declare a disbeliever the one who prostrates to an idol, or slaughters for a grave, or do we wait until we establish the proof against him?

Answer:
He is a disbeliever by this act, but you rule that his action is disbelief, and you declare him a disbeliever outwardly. Then you advise him. If he repents, well and good; otherwise, he is considered a disbeliever outwardly and inwardly. Yes.