Islam a way of life.

Narrated by Jarir (ibn 'Abdullah)(رضى الله عنه), he said, "We were with Messenger of Allah (صلى الله عليه وسلم) in the early hours of the morning, when there came to him some people (who) were (almost) naked, barefooted, wearing striped woollen clothes, with swords hanging down.Most of them from (the tribe of) Mudar,if not all of them, were of Mudar. The face of the Messenger of Allah (صلى الله عليه وسلم) changed when he saw them in poverty. He then entered (his house and then came out and then ordered Bilal (to pronounce the Adhan). He pronounced the Adhan and Iqimah, he then prayed (the Salah) and then addressed (the people). He said, "O mankind! Have Taqwa of your Lord, Who created you from a single person... To the end of the Ayah...Verily, Allah is Ever ar-Raqeeb (All-Watcher) over you."(He then recited) the Ayah in Surah al-Hashr,.."Have Taqwa of Allah. And let every person look to whathe has sent forth for the morrow..." A man gave in Sadaqah from his Dinaar (gold coins), (others), from their dirham (silver coins), (others) from their clothes, others a Saa' of wheat, others a Saa' of dates, till he (the Prophet صلى الله عليه وسلم) said, even if it be half a date. (Jarir) said, Then a person came from among the Ansar with him a bag of money which his hands could scarcely lift, in fact, they could not (lift it). (Jarir) said, then the people followed (suit) continuously, till I saw two heaps of eatables and clothes, till I saw the face of the Messenger of Allah (صلى الله عليه وسلم) glistening, like gold (on account of joy). Then the Messenger of Allah (صلى الله عليه وسلم) said, 'Whoever starts a good precedent in Islam, there is a reward for him for this (act of goodness) and also a reward like that of those who followed him, without it detracting in the least from their reward. And whoever starts a bad precedent in Islam, there is upon him the burden the like of it, and the burden of him who also acted upon it, without it detracting in the least from their burden.' " [Related by Muslim, an-Nasa'i, ibn-Majah, at-Tirmidhi]

Saa'; equivalent to 2.4 kilograms

Dinaar; Islamic pure Gold coins
Dirham; Islamic pure Silver coins

http://islamqa.info/en/ref/864/