And He, Mighty and Majestic is He, said:[And whatever good you send ahead for yourselves, you will find it with God. It is better and greater in reward] 1 .
[18] And from what our master Abu Abdillah al-Husayn bin Hamdan al-Khasibi, illumined God his face, narrated on the authority of his sheikh Abu Muhammad Abdillah al-Jannan, on the authority of the Scholar, transcended his might, that he said: "A deed without knowledge is harmful, not beneficial, and a deed with knowledge is beneficial, not harmful."
And God, Mighty and Majestic is He, already said:[Say, "Are those who know equal to those who do not know?" Only the possessors of understanding remember] 2 .
And His, Mighty and Majestic is He, saying:[Except those who bear witness to the truth, and they know] 3 .
So God, Glory be to Him and Exalted is He, already confirmed by His saying that the witness is not true in his testimony until he is a knower of whom the witnessing is for,