A disbeliever or captive who testifies once and then dies: is the funeral prayer performed for him?

Ibrahim was asked about a captive taken from the land of the enemy: what is the ruling about him? He said: "If he affirms the Oneness of Allah (tawhid) and the two prostrations (the prayer), the funeral prayer is to be offered over him."

Khaythamah said: If he has prayed once, the funeral prayer is to be offered over him.

Al-Hasan said: If he has said la ilaha illallah (there is no god but Allah), the funeral prayer is to be offered over him.

Sayyiduna Anas bin Malik (may Allah be pleased with him) said: There was a Jewish youth who used to serve the Prophet (peace and blessings be upon him). He fell ill, and the Prophet (peace and blessings be upon him) came to visit him and said: "Do you bear witness that there is no god but Allah and that I am the Messenger of Allah?" The Jewish youth looked at his father, and his father said: "Say as Muhammad (peace and blessings be upon him) is telling you." He said it, and then he died. He (peace and blessings be upon him) said: "Offer the funeral prayer over your companion."

Sahl al-Sarraj said: Muhammad bin Sirin was asked about some people who had been brought as captives. Their condition was that if they were told to pray they prayed, and if they were not told they did not pray. One of them died; is the funeral prayer to be offered over him? He said: "Has it become clear to you that he is one of the people of Hellfire?" They answered: "No." He said: "Then wash him, shroud him, perfume him, and offer the funeral prayer over him."

A man said to al-Sha'bi: "I bring slaves (for trade), and some of them die; shall I offer the funeral prayer over them?" He said: "If he used to pray, offer the funeral prayer over him; otherwise do not."

Al-Zuhri said: If a disbeliever affirms the testimony of faith while in the throes of death, the funeral prayer is to be offered over him.