Hadith 4355
Narrated Muadh ibn Jabal: Abu Musa said: Muadh came to me when I was in the Yemen. A man who was Jew embraced Islam and then retreated from Islam. When Muadh came, he said: I will not come down from my mount until he is killed. He was then killed. One of them said: He was asked to repent before that.
Hadith 4788
Narrated Aishah, Ummul Muminin: When the Prophet ﷺ was informed of anything of a certain man, he would not say: What is the matter with so and so that he says? But he would say: What is the matter with the people that they say such and such?