فَاسْتَمْسِكْ بِالَّذِي أُوحِيَ إِلَيْكَ ۖ إِنَّكَ عَلَىٰ صِرَاطٍ مُّسْتَقِيمٍ (43)
(43:43) So hold fast to what has been revealed to you. Surely you are on the Straight Way. *38
*38) That is, "You should not worry as to what punishment do those who are resisting and opposing the truth with injustice and dishonesty receive and when, nor should you worry whether Islam flourishes during your lifetime or not. For you this satisfaction is qute enough that you are on the Right Path. Therefore, you should go on fulfilling your mission unconcerned about the results, and leave it to Allah whether He defeats falsehood in front of you or after you. "