lt was narrated from Abu Hurairah that the Prophet ﷺ said: "A man is not to undersell his brother, nor is he to fry to out haggle his brother".
The Prophet Muhammad ﷺ taught us that it is wrong for a person to try and take advantage of another person when trading goods or services. He said that a man should not undersell his brother, nor should he try to out haggle him either. This means that we must always be fair in our dealings with others, no matter what the situation may be. We must remember that Allah is watching over us at all times, so it's important for us to act honestly and fairly towards one another if we want His blessings in this life and the next.