Quran 18:27 — The Cave (Al-Kahf)

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.

[18:26] Say, "GOD is the best knower of how long they stayed there." He knows all secrets in the heavens and the earth. By His grace you can see; by His grace you can hear. There is none beside Him as Lord and Master, and He never permits any partners to share in His kingship.

[18:28] 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.