Do Not Envy One Another
Abu Hurayrah (radi Allahu anhu) reported that the Messenger of Allah (sal Allahu alaihi wa sallam) said, “Do not envy one another; do not inflate prices by overbidding against one another; do not hate one another; do not harbour malice against one another; and do not enter into commercial transaction when others have entered into that (transaction); but be you, O slaves of Allah, as brothers. A Muslim is the brother of another Muslim; he neither oppresses him nor does he look down upon him, nor does he humiliate him. Piety is here, (and he pointed to his chest three times). It is enough evil for a Muslim to hold his brother Muslim in contempt. All things of a Muslim are inviolable for his brother-in-faith: his blood, his property and his honour.”
This Hadith elaborates the importance of mutual brotherhood and goodwill among the Muslims. They are warned against jealousy which is a very malicious moral disease. One who suffers from it does not like to see others in happy circumstances and wants that they are deprived of whatever good they have.
This Hadith also prohibits Muslims from mutual hatred, enmity and indifference to others because all such things go against the concept of Islamic fraternity. The Hadith also warns Muslims against Najash (false bidding to raise the price in an auction) as it is clear deception and fraud is opposed to goodwill for others, while Muslims are required to express for each other goodwill, not ill-will.
This Hadith also prohibits making one bargain over the others because it generate malice and enmity.
And Allah Knows Best!