Imam Muhammad Al-Baqir (as) says that Allah sent two angels to the earth. They met each other halfway to the destination. One asked the other why Allah had sent him to the earth? The other asked the first, why he has been sent? The first angel said, “In Babel a sinner has wished to have fish. I have been ordered to snare the fish towards the net of the fisherman in the Babel Sea so that the wish of that cruel person is fulfilled and he gets his heart’s fill of whatever he wants in this world only.”
Then he asked the second angel, “what is your errand?” The second angel said, “I have been ordered to perform a very unusual task! A pious Mu’min keeps himself busy in prayer the whole night and fasts during the days. His piety is the subject of adulation amongst the inmates of the Firmament! At this moment he has put a pot on the fire to cook his broth for breaking the fast. I have to go and turn that pot over. The purpose is that the Mu’min gets closer to Allah from more hardship caused to him!”
Reference :Ain-Al Hayat, The Essence of Life