Sincerity
Whatever you give in charity benefits your own soul, as long as you do so seeking Allah’s pleasure. Whatever you donate will be repaid to you in full, and you will not be wronged.
2:272The guiding of them is not thy duty (O Muhammad), but Allah guideth whom He will. And whatsoever good thing ye spend, it is for yourselves, when ye spend not save in search of Allah's Countenance; and whatsoever good thing ye spend, it will be repaid to you in full, and ye will not be wronged.