Surah An Nisa verse 36-42

Translation:

36. Worship Allah and join none with Him in worship, and do good to parents, kinsfolk, orphans, Al-Masakin (the poor), the neighbour who is near of kin, the neighbour who is a stranger, the companion by your side, the wayfarer (you meet), and those (slaves) whom your right hands possess. Verily, Allah does not like such as are proud and boastful;
37. Those who are miserly and enjoin miserliness on other men and hide what Allah has bestowed upon them of His Bounties. And We have prepared for the disbelievers a disgraceful torment.
38. And (also) those who spend of their substance to be seen of men, and believe not in Allah and the Last Day [they are the friends of Shaitan (Satan)], and whoever takes Shaitan (Satan) as an intimate; then what a dreadful intimate he has!
39. And what loss have they if they had believed in Allah and in the Last Day, and they spend out of what Allah has given them for sustenance? And Allah is Ever All-Knower of them.
40. Surely! Allah wrongs not even of the weight of an atom (or a small ant) , but if there is any good (done), He doubles it, and gives from Him a great reward.
41. How (will it be) then, when We bring from each nation a witness and We bring you (O Muhammad ) as a witness against these people?
42. On that day those who disbelieved and disobeyed the Messenger (Muhammad ) will wish that they were buried in the earth, but they will never be able to hide a single fact from Allah.

Explanation

Worship no one other than Allah and associate no other being (living or dead with Him), loving anyone more than Allah and making someone so important in your life that his/ her importance supercedes that of Allah is also a form of Shirk. The verse commands us to be kind and obedient towards your parents (also includes grandparents). The beauty of our religion is obvious from the command to be kind to orphans and look after his needs. An orphan’s father dies and the entire society is commanded by Allah to look after him, such is the beauty of Islam. Allah also tells us to be good to our neighbors whether they are our relatives or strangers, look after them and also adopt a good behavior towards colleagues, friends, acquaintances and people you interact with in day to day life. Travelers are also entitled to a respectful and kind behavior. Slaves and animals should also be dealt with kindly.

Allah does not like those people who are miserly and who encourage others to be misers as well. As a result of their miserly attitude, orphans, travelers and other needy people suffer. Allah blesses such people with numerous blessings and they either hoard it (if its wealth) or keep it hidden from people(so that the needy of the society do not ask for his help) and this trait is severely disliked by Allah. These blessings can be in any form be it wealth and money, knowledge or anything else that provides benefits to others if shared. For such ungrateful people a severe torment awaits them in the Hereafter. And then there are people who spend their money just to show off and boast to people, even when they spend in the way of Allah, their intention is to gain respect and goodwill among people and not in the eyes of Allah. So it’s all pretentiousness of being pious and kind. Such people who do not believe in Allah and the Last day, yet they spend in charity for the purpose of showing off, such people are the friends of the devil and for them a dreadful torment is inevitable. Signs that indicate that a person is friends with the devil:

•          He does not worship Allah
•          Is involved in shirk
•          Fails to adopt a amiable and kind attitude with whoever he interacts, fails to give the rights to relatives, parents, friends etc
•          He is a miser and encourages others to adopt a miserly attitude
•          Hides the blessings of Allah for fear of having to share it with others
•          Spends just to show people how pious and generous he is.

What loss would these people have had if only they had believed in Allah and the day of Judgement and had spent out of what Allah had blessed them with. And Allah is not unfair infact if someone does good then with His grace the rewards are doubled. And on the Day of Judgement each messenger will testify for/against their nation that whether they nation accepted their message or not. For the Muslim nation  Allah will appoint the Holy Prophet pbuh as a witness who will  testify whether his people accepted the message of Allah and acted on it or not. On that Day all those who disobeyed the Holy Prophet and refused to believe in Allah and the Last Day, they all will wish that somehow the ground opens up and takes them in so that they could avoid facing the Lord. But nothing can be hidden from Allah.