Do not hurt others feelings

The Prophet Muhammad (peace be upon him) asked one group of his companions, “Do you know who the bankrupt person is?” 

They said, “A bankrupt person amongst us is the one who has neither money nor property.”

The Prophet (pbuh) said, “The bankrupt person of my nation is he who would come on the Day of Resurrection with prayer and fast and giving great amounts in charity. And at the same time, he would come having abused this one, and slandered that one, and consumed the wealth of the other unlawfully, and shed the blood of yet others and having beaten others. Then any person whom he has wronged will be given from his good deeds on that Day. And if his good deeds are exhausted until he clears the account concerning all of the people he has oppressed, the sins of those people whom he has wronged will be thrown unto his account and after that, he will be thrown into the hellfire.” (Muslim)

The Prophet Muhammad (peace be upon him) "Whoever wronged his brother with regard to his honour or any other matter, should seek his forgiveness today, before there are no longer any dinars, or dirhams; and if he has any righteous deeds, they will be taken from him, in accordance with the wrong he did; and if he has no hasanaat, some of the sayi`aat of his counterpart will be taken and added to his burden.” (Bukhari)