One who apostatizes from Islam: what is due from him?

Abd al-Rahman reports: When the news of the conquest of Tustar came to Sayyiduna Umar (may Allah be pleased with him), and Tustar is the name of a region of Basrah, he asked them: "Is there any other news from afar?" They said: "A man from the Muslims joined the polytheists, so we seized him." He asked: "What did you do with him?" They said: "We killed him." He said: "Why did you not put him in a house, and lock the door on him, and feed him one flatbread each day, then ask him to repent three times? If he repented, well and good; otherwise you would kill him!" Then he said: "O Allah, I was not present, I did not order it, and I was not pleased when the news reached me."

Al-Sha'bi reports that Sayyiduna Ali (may Allah be pleased with him) said: "The apostate is to be asked to repent three times; then if he returns to disbelief, he is to be killed."

Sulayman bin Musa reports that Sayyiduna Uthman (may Allah be pleased with him) said: "The apostate is to be asked to repent three times."

Sayyiduna Ibn Umar (may Allah be pleased with them both) says: "The apostate is to be asked to repent three times. If he repents, he is to be left alone, and if he refuses, he is to be killed."

Al-Mughirah reports that Ibrahim said: "The apostate is to be asked to repent. If he repents, he is to be left alone, and if he refuses, he is to be killed."

Humayd bin Hilal reports that Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) came to Sayyiduna Abu Musa (may Allah be pleased with him) while a Jewish man was with him. He asked: "What is his matter?" He said: "This Jew accepted Islam and then apostatized," and Sayyiduna Abu Musa had been asking him to repent for two months. At this Sayyiduna Mu'adh said: "I will not sit until I strike off his neck. This is the decree of Allah and the decree of His Messenger (peace and blessings be upon him)!"

Hayyan reports that Ibn Shihab al-Zuhri said: "He is to be called to Islam three times; then if he refuses, his neck is to be struck off."

Ibn Jurayj reports that Ata said concerning a person who adopts disbelief after accepting Islam: "He is to be called to Islam; then if he refuses, he is to be killed."

Ibn Jurayj reports that Amr bin Dinar said concerning a man who adopts disbelief after believing: "I heard Ubayd bin Umayr say: 'He is to be killed.'"

Sayyiduna Ibn Abbas (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) said: "Whoever changes his religion, kill him."