the recompense for he who kills a believer deliberately is gehenna he is eternal there. allah will be angry with him and will curse him and prepare for him a great punishment.
ومن يقتل مؤمنا متعمدا فجزاؤه جهنم خالدا فيها وغضب الله عليه ولعنه وأعد له عذابا عظيما