The Crisis of Theology in the Modern World By Professor Dr. Aref Ali Nayed

And the example of those who spend their wealth seeking means to the approval of Allah and assuring [reward for] themselves is like the garden on high ground which is hit by a downpour. So it yields its fruits in double. And even if it is not hit by a downpour, then a drizzle [is sufficient]. And Allah, of what you do is Seeing (Surah al-Baqarah 2:265)