In a sermon, Rasulullah sallallahu ‘alayhi wa sallam said: “There are two things which are very great – do not forget them.” That is, jannah and jahannam. Upon saying this, he began weeping profusely so much so that his blessed beard got wet. He then said: “I swear in the name of that being in whose hands is my life that if you were to come to know that which I know about the hereafter, you will go away into the jungles and walk around pouring sand over your heads.”
