The benefits derived from the saying of Allah the Exalted: << ليجزيهم الله أحسن ما عملوا و يزيدهم من فضله و الله يرزق من يشآء بغير حساب >

It also contains evidence that the reward is of the same kind as the deed, and that in acts of obedience it is even better than the deed. Where do we take this from? something beyond what they did.
It contains evidence of the knowledge of Allah, Mighty and Majestic. Where do we take this from? Because if they are rewarded with the best of what they did, there is no reward except after the rewarder knows what they did, then He rewards them for it.
It also contains the affirmation of power through the affirmation of reward, for He does not reward except one who is capable. If you did a favor to a person, the Prophet (peace and blessings be upon him) said: So Allah, Glorified and Exalted is He, in the perfection of His power, is not diminished by what He gives the workers of their reward and wages.
It contains the affirmation of the will of Allah, and Allah provides for whom He wills. The affirmation of the will of Allah in His right, meaning in what relates to His action, is agreed upon; no innovator or anyone else has contradicted it. As for the will of Allah in relation to the actions of creation, a group called the Qadariyyah contradicted it, claiming that the servant is independent in his action and that the will of Allah has no connection to it. Some of them went so far as to deny the knowledge of Allah, saying that Allah, Glorified and Exalted is He, does not know the actions of the servant except after he does them, and before that He does not know them, Glorified and Exalted is He. And they denied the explicit, authentic texts affirming the knowledge of Allah, Glorified and Exalted is He, in everything, even in the actions of man.
It also contains His saying the abundance of the favor of Allah, Mighty and Majestic, and that He, Glorified and Exalted is He, gives without reckoning. Does "without reckoning" mean without measure? Why do we not say that?
The student: ...
The Shaykh : Because Allah says that everything is with Him by measure, even the drop that falls from the sky to the earth is measured by Allah the Exalted, but without reckoning, meaning He does not reward the person by reckoning, but with much abundance.