Narrated by Abu Hurairah(Radhiallaho anho):
Allah’s Messenger (sallAllaahu `alaihi wasallam) said: Do you know  who is poor?

They (the Companions of the Prophet) said: A poor man  amongst us is one who has neither dirham with him nor wealth.

He (the  Prophet) said:

The poor of my Ummah 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 one (who suffered at his hand). And if his  good deeds fall short to clear the account, then his sins would be  entered in (his account) and he would be thrown in the Hell-Fire.
Sahih Muslim Number 6251