Abdullah bin Abbas reported,

The Prophet ﷺ said, "The most hated of people to Allah are three: a person who commits sacrilege in the Sacred Precinct, a person who seeks to revive the practices of the days of ignorance within Islam, and a person who unjustly demands another's blood in order to shed it."

Azami 6811

Sahih

عن ابن عباس

أن النبي ﷺ قال: أبغض الناس إلى الله ثلاثة: ملحد في الحرم، ومبتغ في الإسلام سنة الجاهلية، ومطلب دم امرئ بغير حق ليهريق دمه.

الأعظمي 6811صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Retaliation and crimes
Chapter
Prohibition of protected blood
Section
Killing a soul unjustly is among the greatest of major sins
Numbering
Jami al-Kamil 6811 (2nd edition)
Azami 6811