Tafsir of Al-Mu'minoon 23:7

And those who guard their private parts. Except from their wives and their right hand possessions, for then, they are free from blame. But whoever seeks beyond that, then those are the transgressors. means, those who protect their private parts from unlawful actions and do not do that which Allah has forbidden; fornication and homosexuality, and do not approach anyone except the wives whom Allah has made permissible for them or their right hand possessions from the captives. One who seeks what Allah has made permissible for him is not to be blamed and there is no sin on him. Allah says:

فٳنهم غير ملومين

فمن ابتغى وراء ذلك

they are free from blame. But whoever seeks beyond that, meaning, other than a wife or slave girl,

فٲوليك هم العادون

then those are the transgressors. meaning, aggressors. Allah says:

والذين هم ﻻماناتهم وعهدهم راعون