Abu al-Tufayl said: Ali (may Allah be pleased with him) called the people to pledge allegiance, and among them came Abd al-Rahman bin Muljam, although he had seen him twice before that. Then he said: "What is holding back the most wretched of them? By the One in whose hand is my soul, this (beard) will surely be dyed with this (blood from the head)," and he recited these two verses:
"Gird up your loins for death, for death is coming to you.
And do not be alarmed by death when it descends upon your valley."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 168