﴿ يَٰٓأُخْتَ هَٰرُونَ مَا كَانَ أَبُوكِ ٱمْرَأَ سَوْءٍۢ وَمَا كَانَتْ أُمُّكِ بَغِيًّۭا ﴾

“O sister of Aaron! Thy father was not a wicked man, nor was thy mother a loose woman!"”

O sister of Aaron — he was a righteous man in other words what is meant is O you who are like him in terms of chastity — your father was not a wicked man that is a fornicator nor was your mother unchaste’ that is a fornicatress so how is it that you have this child?