What has most attracted the attention of the unfair and the unthinking is narrations like these. The reality of the matter is this:
With our narrow mind and short views in this world, we know how much we imagine the the rewards of Moses and Aaron (Peace be upon them) to be. The reward the Absolutely Compassionate One will give to one of His infinitely needy servants in the world of eternity and everlasting happiness, in return for a single invocation may be equal to the reward of those two, but equal to the rewards as we conceive of them and surmise them to be.
For example, there is a primitive, uncouth man who has never seen the king and does not know the majesty of his rule. He imagines a lord in a village, and with his limited ideas thinks of the king as a more exalted version of the lord. Long ago with us even, there was a simple-minded tribe who used to say: "Our lord knows what the Sultan does as he cooks his bulgur soup on his stove in a saucepan." That is to say, they imagined the Sultan in such a narrow situation and so common a form that he cooked his own wheat soup; they supposed him to have the majesty of a captain. Now, if someone was to say to one of that tribe: "If you do this work for me today, I'll give you as much majesty as you think the Sultan has, and give you a rank as high as a captain." To say that is right, because, of the majesty of kingship, what enters the narrow bounds of his ideas is only the majesty of a captain.
Thus, with our worldly views and narrow minds, we cannot think as much as that primitive man of the true rewards which look to the hereafter. It is not the equivalent of the true rewards of Moses and Aaron (Peace be upon them), for according to the rule of similes and comparisons, the unknown is compared to the known; the true reward, which is unknown, for an invocation of one of God's believing servants is compared with the rewards that we know and surmise. Moreover, the surface of the sea and the heart of a droplet are equal when it comes to holding the complete reflection of the sun. The difference is only in quality. The nature of the reward reflected in the mirrors of the ocean-like spirits of Moses and Aaron (Peace be upon them) is exactly the same in nature as the reward that a believing servant, who is like a droplet, receives from a Qur'anic verse. They are the same in nature and quantity, while their quality is dependent on capacity.