86
This is an instance of their ingratitude for which the hypocrites were rebuked in v. 74.
They broke their covenant with Allah which enjoined them to spend money in charity, if Allah enriched Them by His bounty. This shows that they were confirmed criminals and they did not care in the least for the agreements they made, and were niggardly and had no moral code to observe.
87
This refers to the mean conduct which the hypocrites evinced on the occasion of the appeal of the Holy Prophet for contributions towards the Tabuk expedition. The well-to-do hypocrites did not themselves make any contributions, but when the sincere Muslims came forward with generous contributions according to their means, they began to deride them. If a well-to-do Muslim made a handsome contribution, they would at once accuse him to be guilty of a 'showoff . On the other hand, if a poor Muslim contributed a paltry sum which he could hardly spare after sacrificing some of the barest necessities of his family or contributing the small earnings obtained by hard work, they would at once ridicule, saying, `Lo! Here is the farthing that will help conquer the forts of the Roman Empire!"