I said to my Brother: "You disbeliever!" because He does not pray
Question :
I had an argument with my brother on a matter and in a state of anger, I said to him: "Get away from me, you disbeliever!" because he does not pray, except on occasions such as the visits of relatives and such like. So what is the ruling on that? Is it correct that he is so?
Answer:
It has been authentically reported from the Prophet that he said:
"Between a man and disbelief and Shirk is abandoning the prayer.
And Imam Ahmad and the compilers of the Sunan have narrated with a good chain of narration, on the authority of Jabir, from the Prophet that he said:
"The covenant which is between us and them is the prayer, and whoever abandoned it, has disbelieved.»
The Hadiths which carry this meaning are numerous. However, it is incumbent upon you in such circumstances not to assail him with such words, but to advise him first of all and inform him that abandoning prayer is an act of disbelief and misguidance and that it is incumbent upon him to turn to Allah, the Most High in repentance, and hopefully he may benefit from you and accept your advice.
Source:
Ibn Baz
Fatawa Islamiyah, Vol. 2 Pages 372- 373