Ibn 'Umar (May Allah bepleased with them) reported:
Messenger of Allah ﷺ said, "A believer continues to guard his Faith (and thus hopes for Allah's Mercy) so long as he does not shed blood unjustly".

[Al-Bukhari].

وعن ابن عمر رضي الله عنهما قال: قال رسول الله ﷺ: “ لا يزال المؤمن في فسحة من دينه ما لم يصب دمًا حرًا" ((رواه البخاري)).