"....no day passes without the Angel of Death, looking upon people's faces, studying them five times a day, and those he finds engaged in merriment or committing sin, he exclaims disapprovingly: "Poor, pitiable slave who is heedless of what is intended for him (death). Do as you please, for indeed I have for you a wink of the eye by which I will cut off your aorta*"

(Taken from 'Gems and Jewels-Pg 75)

*Aorta-The largest artery of the body.