Who is the one who would give Allah a good loan so that Allah multiplies it for him many times? Allah withholds and extends, and to Him you are to be returned.
The example of those who spend their wealth in the way of Allah is like a seed which grows seven spikes; in each spike is a hundred grains. And Allah multiplies for whom He wills. And Allah is all-Encompassing and Knowing.
Those who spend their wealth in the way of Allah and then do not follow up what they have spent with reminders or injury will have their reward with their Lord, and there will be no fear concerning them, nor will they grieve.
A graceful word and forgiveness are better than charity followed by causing hurt. Allah is free of all wants, and He is Most Forbearing.
O ye who believe! Cancel not your charity by reminders of your generosity or by injury― like those who spend their substance to be seen of men, but believe neither in Allah nor in the Last Day. They are in Parable like a hard, barren rock, on which is a little soil; on it falls heavy rain, which leaves it (just) a bare stone. They will be able to do nothing with aught they have earned. And Allah does not guide the disbelieving people.
And the likeness of those who spend their substance seeking to please Allah and to strengthen their souls, is as a garden high and fertile: heavy rain falls on it but makes it yield a double increase of harvest, and if it receives not heavy rain, light moisture sufficeth it. and Allah is watchful of what you do.
Would any of you wish to have a garden with date-palms and vines, with rivers flowing underneath, and all kinds of fruits for him therein, while he is striken with old age and has weak offspring, and it is hit by a whirlwind containing fire and is burned? This is how Allah makes the signs clear to you, that you might give thought.
Al-Baqarah Verse 245 and 261-266