Fulfilling the Contract
The Quran enjoins the believers to fulfil a covenant one has made. (2:40) We will be questioned before God about the covenant. This shows that the covenant is not just a matter between two people. God is also involved in this matter as a third party.
The importance of fulfilling a covenant (agreement) is so great that man either should not make a covenant with anyone or if he makes one, he must fulfil it. Not making a covenant is not a crime. But not fulfilling it is a serious crime. Breaking even one covenant is such a great crime that it is tantamount to breaking all human covenants. Why is every breach of contract or covenant a breach of all human covenants? This is because the whole system of social justice is based on respecting covenants. If respect for covenants is lost, the atmosphere of justice in society will come to an end.