Muhammad ibn Al Mutawakkil (rahimahullah) says, “It has reached me that the words ‘Death is enough as an admonisher, O Umar’ were engraved on the ring of Sayyiduna ‘Umar (radiyallahu ‘anhu)”.... (Kitabud Dibaj of Abul Qasim Ishaq ibn Ibrahim Al Khuttali; Refer: Kanzul ‘Ummal, Hadith: 35818 and Tarikh Ibn ‘Asakir, vol. 44 pg. 260)