"What is the meaning and authenticity of the Hadith: ""Verily, Allah will support this religion by means of a sinful man""? "

The hadith speaks about Allah supporting His religion even with an immoral man, and it is mentioned in the two Sahihs. The immoral man includes the disbeliever and the wicked. The story of the hadith revolves around a man who fought fiercely in Khaybar, despite the Prophet ﷺ stating that he was among the people of Hell. After being severely wounded, he killed himself at night. The Prophet ﷺ ordered Bilal to announce that only a Muslim soul enters Paradise, and that Allah supports this religion with the immoral man.