It is mentioned in the noble hadith: “Among the very first people for whom the Fire will be kindled on the Day of Resurrection is a scholar who did not act upon his knowledge.” Knowledge is inseparable from action, and action is the fruit of knowledge; knowledge without action is like a tree without fruit—of no benefit whatsoever. Indeed, knowledge was only revealed so that it would be put into practice.
Likewise, action carried out without knowledge becomes a burden and a source of misguidance for its doer. If a person acts without knowledge, his deed turns into toil and ruin for him. The Prophet (peace and blessings be upon him) said, “Whoever performs a deed that is not in accordance with our affair, it is rejected.”
For this reason we recite in every rakʿah of the prayer: “Guide us to the straight path, the path of those You have blessed, not of those who have incurred Your wrath nor of those who have gone astray” [al-Fatiha: 6-7]. Allah thus designated those who act without