Concerning lawful earnings...
Concerning lawful earnings, God has issued many orders and the Prophet's Household has completely described the religiously legal ways to earn money. Any money gained in illegal ways such as bribery, usurpation, theft, deceit, looting and usury is illegal. Whoever tries to make lawful money is worshipping God and God will reward him. Whoever tries to illegally make money is sinning and God will punish and curse him.
If one makes money illegally and does not listen to anybody's advice saying God has desired so, then he has insulted God, speaks satanically and has lied. There are many Quranic verses stating God has provided lawful daily bread for everyone. The Quran invites everyone to make a lawful daily living and has given no illegal earnings to anyone, since thinking in the wrong way causes one to make illegal money.
Saying that God allows forbidden actions is an insult and a great sin which will cause one to be punished on the Day of Judgment. Man's intellect dictates that it is illogical to say God gives illegal provisions to man, but rather He has placed emphasis on benefiting from lawful and completely legally earned money. It is paradoxical for God to give illegal earnings to man and there are no paradoxes concerning God. Stupid people foolishly and ignorantly insult God.
Imam Baqir (Pbuh) has stated: God has ordered all men to make a lawful living. This money will cause man to be healthy. It is not God's fault that some make an illegal living: The forbidden way to earn a living is not the Right Way. Satan is the designer of the forbidden ways to make money. If one illegally makes money, his lawful daily bread will be lessened to the same extent. If we consider lawful and legal means of earning money, God respects us a lot.
[Bihar al-Anwar , v.5, p.147] Don't Deprive Yourself of the Lawful Things Imam Ali (Pbuh) entered the mosque and told a man to keep an eye on his camel. The man stole the camel's bit in Imam Ali's (Pbuh) absence. When Imam Ali (Pbuh) came out of the mosque to pay the man two Durham's (coins), he saw his camel without the bit. He gave the money to his servant and asked him to go and buy a bit.
The servant went and bought the same bit from the thief without knowing who he was and took it to the Imam (Pbuh). When he saw the bit the Imam said that a servant deprives himself of lawful daily bread due to his impatience, but he does not get more than is determined for him by God.