It is reported that the Messenger of God (may peace be upon him) said:
"Do you know who is the one who is bankrupt?
They (the Companions of the Holy Prophet) said: A bankrupt man amongst us is one who has neither dirham with him nor wealth.
He (the Holy Prophet) said: The bankrupt of my community would be he who would come on the Day of Resurrection with prayers and fasts and Zakat but (he would find himself bankrupt on that day as he would have exhausted his funds of virtues) since he hurled abuses upon others, brought calumny* against others and unlawfully consumed the wealth of others and shed the blood of others and beat others, and his virtues would be credited to the account of those who suffered at his hand.
And if his good deeds fall short to clear the account, then the sins of those who suffered at his hand would be entered in his account and he would be thrown in the Hell-Fire"
* "Calumny" is the act of uttering false charges or misrepresentations maliciously calculated to damage another's reputation.
The above Hadith was related in Sahih Muslim, Book 032, Number 6251. ( The Book of Virtue, Good Manners and Joining of the Ties of Relationship)