Quran 18:28 — The Cave (Al-Kahf)

You shall force yourself to be with those who worship their Lord day and night, seeking Him alone. Do not turn your eyes away from them, seeking the vanities of this world. Nor shall you obey one whose heart we rendered oblivious to our message; one who pursues his own desires, and whose priorities are confused.

[18:27] You shall recite what is revealed to you of your Lord's scripture. Nothing shall abrogate His words, and you shall not find any other source beside it.

[18:29] Proclaim: "This is the truth from your Lord," then whoever wills let him believe, and whoever wills let him disbelieve. We have prepared for the transgressors a fire that will completely surround them. When they scream for help, they will be given a liquid like concentrated acid that scalds the faces. What a miserable drink! What a miserable destiny!