Hadith 17:968
Waki’ narrated to us, from Sufyan, from ‘Imran ibn Muslim, from Ibrahim al-Taymi, from his father, who said: We were sitting with ‘Umar when a man praised another man to his face. When he turned away, he [‘Umar] said: "You have slaughtered the man, may Allah slaughter you."
حدثنا وكيع عن سفيان عن عمران بن مسلم عن إبراهيم التيمي عن أبيه قال كنا جلوسا عند عمر فأثنى رجل على رجل في وجهه حين أدبر فقال عقرت الرجل عقرك الله