Surah Al-Qalam, Ayah 27

قَالُواْ سُبْحَـنَ رَبّنَآ إِنَّا كُنَّا ظَـلِمِينَ- فَأَقْبَلَ بَعْضُهُمْ عَلَى بَعْضٍ يَتَلَـوَمُونَ- قَالُواْ يوَيْلَنَآ إِنَّا كُنَّا طَـغِينَ- عَسَى رَبُّنَآ أَن يُبْدِلَنَا خَيْراً مّنْهَآ إِنَّآ إِلَى رَبّنَا رغِبُونَ- كَذَلِكَ الْعَذَابُ وَلَعَذَابُ الاْخِرَةِ أَكْبَرُ لَوْ كَانُواْ يَعْلَمُونَ-

فَلَمَّا رَ‌أَوْهَا قَالُوا إِنَّا لَضَالُّونَ (But when they saw it [ the place of the ruined garden ], they said, "We have missed the way."....68:26). In other words, when they did not find their garden on that spot, they first thought that they must have lost their way and gone to the wrong place. But when they saw the surroundings, they realized that it was the right place they have gone to, but the garden had been burnt up and destroyed. So, they exclaimed: بَلْ نَحْنُ مَحْرُ‌ومُونَ "No, but we are deprived [ of the fruits ]....68:27)

‘Do not give in to the deniers of truth’ means that the words of those who deny the truth are not worthy of acceptance. On the one hand, there is the upholder of Truth, who has taken his stand by virtue of reasoning. There is no contradiction between his words and his actions. On the other hand, there are his opponents who are of low character and have nothing to their credit except for false utterances. The missionary of Truth relies on Truth, whereas his opponents rely on their material status. The missionary of Truth is a follower of principles, unlike his opponents who are unprincipled, and whose views are highly inconsistent. For one who has a sound mind, this difference is enough to show who is on the right path and who is not.