Whats that mexican story with the three brothers looking for a job?

they leave there house once they are old enough, but not together, and encounter a woman that ask for food and water, the first one says he dosent and she tells him to go to her brother for a job and he tells the guy to take this note with his dog and donkey, and says if the dog dosent stop to rest then he shouldnt, but the guy finds a town which is hell and is lost, the same happens to the other brother, and the third brother goes to look for a job, does the same but passes the town because the dog didnt stop, he then encounters a river of blood, a river of swords, skinny sheep in a area full of grass, and fat sheep in a area without grass, goes back to the man and finds out he is god and the cityh was hell and that he will go to heaven, the brother asks if is brother can go to heaven but god says they are lost in hell. what is that story called??
Whats that mexican story with the three brothers looking for a job?
I would call it "DUMB" and I'm not even Mexican.