Al-Matalib al-'Aliyah 3902 — Mention of the killing of Umar

It is narrated from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) that he picked up a straw (from the ground) and (out of his intense fear of Allah) said: "My wish is that I were this (straw), and my longing is that my mother had never given birth to me, and that I were 'a thing utterly forgotten' [Surah Maryam: 23], that is, 'something forgotten completely, with not even a name or trace of it remaining.'"
In the chain of this athar, Asim bin Ubaydullah is a weak narrator; however, words of this kind from Sayyiduna Umar al-Faruq (may Allah be pleased with him), reflecting fear of Allah and concern for the Hereafter, are also narrated in other reliable athar.