The next verse (54) says إِنَّ فِي ذَٰلِكَ لَآيَاتٍ لِّأُولِي النُّهَىٰ (Surely, in that there are signs for the people of understanding. (20:54). The word النُّهَىٰ is the plural of نُھیَۃ (nuhyah) which is used in the same sense as عققل (aql: Intelligence) because it enables wise and intelligent persons to avoid harmful acts.