It is related by Abu Hurairah (R.A.) that:
"(once) a person abused Abu Bakr (R.A.), and the Prophet (Sallallahu Alayhi Wasallam) was sitting (there), (at that time), and he felt amazed and was smiling (at the behaviour of both), (with the man abusing Abu Bakr (R.A.) continuously and the latter bearing it with patience). But when that person went on with it, Abu Bakr (R.A.), also, returned some of the invectives. The Prophet of Allah (Sallallahu Alayhi Wasallam), thereupon, left the place in some anger. Feeling greatly perturbed, Abu Bakr (R.A.) went after the Prophet (Sallallahu Alayhi Wasallam) to find out the reason of his annoyance and apologise. As Abu Bakr (R.A.) met the Prophet (Sallallahu Alayhi Wasallam) , he said: ' O Prophet of Allah (Sallallahu Alayhi Wasallam)! How is that you remained sitting when the man was hurling abuses at me, without end, but when I too, said something, you got angry and departed from the place?' The Prophet (Sallallahu Alayhi Wasallam) replied: 'An angel of Allah was with you and replying on your behalf as long as you kept quiet and showed patience, but when you started paying him back (in his own coin), the angel went away and the Devil came in, (on seeing an opportunity to add fuel to the fire).'
After it, the Prophet of Allah (Sallallahu Alayhi Wasallam) observed:O Abu Bakr (R.A.)! There are three things that are absolutely true:
One, if an injustice is done to anyone and he forgives it solely for the sake of Allah (and does not take revenge), Allah will support him, in all respects, in return for it (and raise him in esteem both in this world and the next);
Two , whoever opens the door of giving to others and showing kindness to kinsmen, Allah will bestow prosperity upon him and multiply his wealth: and,
Three, whoever will open the door of begging (not out of need), but for adding to his wealth, Allah will cause a further diminution in his possessions.'"
Many thanx to my good friend who forwarded this to me. (You know who u r!!)