Ibn Mubarak stated that Wahb Ibn Al-Ward narrated that Zechariah did not see his son for three days. He found him weeping inside a grave which he had dug and in which he resided. "My son, I have been searching for you, and you are dwelling in this grave weeping!" "0 father, did you not tell me that between Paradise and Hell is only a span, and it will not be crossed except by tears of weepers?" He said to him: "Weep then, my son." Then they wept together.
Other narrations say that John said: 'The dwellers of Paradise are sleepless out of the sweetness of Allah's bounty; that is why the faithful must be sleepless because of Allah's love in their hearts. How far between the two luxuries, how far between them?"
They say John wept so much that tears marked his cheeks.