Why should you not give for Allah’s cause when Allah alone will inherit what is in the heavens and earth? Those who gave and fought before the triumph are not like others: they are greater in rank than those who gave and fought afterwards. But Allah has promised a good reward to all of them: Allah is fully aware of all that you do. Who will make Allah a good loan? He will double it for him and reward him generously.
(Surah Al-Hadid, verse 10 & 11)