Being in the retail/trade business, I can identify with alot of the Hadith below. Honesty & integrity goes a long way, not only do you benefit for the hereafter but read any business book, or ask any consultant. They’ll tell you the same
The Prophet (sallallhu ‘alayhi wasallam) said:
An honest and truthful businessman shall be in the shade of the throne of Allah. (Al-Isbihani)
Prophet Muhammad Sallallhu ‘alayhi wasallam has said that whoever buys stolen goods, knowing such goods to have been stolen, becomes a party to the act of theft.
Almighty Allah’s mercy descends on one who is gentle at the time of buying, selling, and requesting payment. (Tirmizi)
Our Prophet Muhammad Sallallhu ‘alayhi wasallam has said that Almighty Allah proclaims: “I am a one third partner of a two man partnership until one of them acts dishonestly to his partner, and, in such event, I then leave them.”
Prophet Muhammad Sallallhu ‘alayhi wasallam said whosoever sells a defective product without disclosing its defect to the purchaser, shall earn the permanent anger of Almighty Allah and the angels continuously curse such a person.
Our Prophet Muhammad Sallallhu ‘alayhi wasallam has exhorted that we should refrain from taking oaths unnecessarily for although it helps in the sale of one’s products, it reduces the blessings.
Our Prophet Muhammad Sallallhu ‘alayhi wasallam has said, “Whosoever accepts returned products, Almighty Allah will wipe-out his punishment.