Do not engage in any practices that are unfair or unjust towards others

This hadith speaks about the prohibition of buying foodgrains in bulk and then selling them at the same spot before taking them to one's place. It was narrated by Salim b. 'Abdullah, who reported his father having said this, as well as on the authority of 'Ubaidullah b. Abdullah b. Umar through another chain of transmitters that his father used to buy foodgrains in bulk and then carry them to his people. The Prophet Muhammad ﷺ disapproved this practice because it would lead to an increase in prices due to hoarding or speculation which would be unfair for those who could not afford such prices or were unable to buy from other sources due to lack of access or resources. Therefore, this hadith teaches us that we should not engage in any practices that are unfair or unjust towards others, even if they may seem profitable for us personally at first glance.