Allah does not wrong anyone by so much as the smallest speck. And if there is a good deed Allah will multiply it and pay out an immense reward direct from Him. (Qur'an, 4:40)
Those who do good will have the best and more! Neither dust nor debasement will darken their faces. They are the Companions of the Garden, remaining in it timelessly, for ever. (Qur'an, 10:26)
Who will make a good loan to Allah so that He may multiply it for him? He will have a generous reward. (Qur'an, 57:11)
So that Allah can reward them for the best of what they did and give them more from His unbounded favour. Allah provides for anyone He wills without reckoning. (Qur'an, 24:38)
What is with you runs out but what is with Allah goes on for ever. Those who were steadfast will be recompensed according to the best of what they did. Anyone who acts rightly, male or female, being a believer, We will give them a good life and We will recompense them according to the best of what they did. (Qur'an, 16:96-97)