Aslam

(6) Keep away from doubtful things even after giving up unlawful things. Leave the places of the earnings of doubt and restrain yourself from eating doubtful things. Once a man brought milk to the Prophet who asked him : Where-from has this milk come to you ? He said : we have got it from goats. He asked : Wherefrom have you got goats : He said : From such and such a place. Then he drank it and said : We are a people of Prophets. We have been forbidden to eat except good things and to do except good deeds. He said : The believers have been ordered to do the things which the Prophet have been ordered to do. God say : O believers, eat of the good things We have provided you 2:172. The Prophet asked the source of a thing and the source of its source and not beyond that. The Prophet did not enquire about everything. Don't do business with one who has got connection with oppression, breach of trust, theft and interest. The Prophet said : He who prays for long life on an oppressor, loves to be disobedient to God in His world. He said :
When any transgressor is praised, God becomes displeased. He also said : He who honours a transgressor, helps the destruction of Islam.

(7) Adjust accounts of your business with everybody .
Accounts will be taken of you on the Resurrection Day of your business with everybody. A wise man said : I saw a merchant in dream and asked him : What treatment has God meted out to you ?
He said : Fifty thousand account books have been opened before me. 1 asked : Are all these records of sin ? He said: You will find one record for each person you have dealt with in the world. All have been recorded in these account books.