Answer:
In "The Devil and Tom Walker," the author Washington Irving depicts a man called Tom Walker, who sold his soul to the devil for a large sum of money. Tom becomes a usurer and begins to go to church, since he fears the devil will take his soul. On the other hand, he does not fully change, since he remains just as greedy as before. Thus, Irving uses satire to expose Tom's pretense.
Besides, Tom is the universal friend of the needy and he acts like a "friend in need. The reason is that he provides loans to people in need of financial aid and then tricks them into debt.
Irving also makes use of irony to describe Tom's abduction by the devil. In that respect, Tom has never kept his word, but now he is forced to keep his promise to the devil and give up his soul.
In the end, Tom loses his patience and his religiousness, as he asks the Devil to take him if he has "made a farthing." At that moment, he hears three loud knocks at the door and he sees a black man holding a black horse, who is coming for him.