One salient feature of the language of the Quran is that the meanings which are understood of their own accord because of the presence of other words and indicators or because of some logical obviousness are not expressed in words. There are many examples that can be quoted to present this point but the most easily understandable example has been presented [1].

Coming to the verse under consideration (23:5-6):

وَالَّذِيْنَ هُمْ لِفُرُوجِهِمْ حَافِظُوْنَ. إِلَّا عَلَى أَزْوَاجِهِمْ أوْ مَا مَلَكَتْ أَيْمَانُهُمْ فَإِنَّهُمْ غَيْرُ مَلُومِيْنَ

In the above verse also there is an obvious suppression but of a different kind, known as Tazmeen (تضمین). Because of inconsistency or non-homogeneity between the preposition عَلَي (on/upon) and verb حَافِظُوْن (those who guard), there necessarily exists some sort of obvious suppression in this expression which should link this verb with this preposition which are incongruous when seen together in the absence of that suppression. Keeping in view the structure of the verses, that suppression must include words similar in meaning to this عن الوقوع علي أحد (from indulging with anyone) thus clarifying that the verse is not talking about ways of sexual-gratification, rather, it is talking about the individuals with whom a person can establish sexual relations. The verse does not mean that no way of sexual-gratification is allowed except through wives and slave-women; it means that except for wives and slave-women, one cannot appease one’s sexual urge with any other individual.

(For Ghamidi Sahab’s Tafseer Please read footnote 134 in the following link: https://www.javedahmedghamidi.org/#!/quran?chapter=23&paragraph=1&type=Ghamidi)

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[1]

وَمَا مِن دَآبَّةٍ فِي الأَرْضِ وَلاَ طَائِرٍ يَطِيرُ بِجَنَاحَيْهِ إِلاَّ أُمَمٌ أَمْثَالُكُم (٣٨:٦)

And all the beasts that roam in the earth [on their feet] and all the birds that fly on their wings [in the sky] with both their wings are but communities like your own. (6:38)

A little deliberation shows that in the above verse an ellipses of parallel phrases has occurred. Because of the presence of the expression فِي الأَرْضِ [in the earth] in the first part of the sentence, there is an ellipses of its parallel expression فِي الّسَمَاءِ [in the sky] in the second part. Similarly, because of the presence of the expression يَطِيرُ بِجَنَاحَيْهِ [fly on their wings] in the second part of the sentence, there is an ellipses of its parallel expression تَدُبُّ عَلَى رِجْلِهَا [roam on their legs] in the first part of the sentence. Though this style is not present in the English language, it exists abundantly in classical Arabic.