خَيْرُ البَرِيَّةِ

خَيْرُ البَرِيَّةِ is a phrase (شِبْهُ الجُمْلَةِ) consisting of a possessed noun followed by a possessive noun

PhraseNoun / NounNounNoun
شِبْهُ الجُمْلَةِمُضَافٌ وَ مُضَافٌ إِلَيْهِمُضَافٌ إِلَيْهِمُضَافٌ
PhrasePossessive compoundPossessive noun/ownerNoun possessed/owned
the best of creationخَيْرُ البَرِيَّةِ=البَرِيَّةِ+خَيْرُ
the best of creationcreationthe best of
Surah/Below is the only verse in the holy Quran containing the possessive compoundخَيْرُ البَرِيَّةِ
Verse
98-7Truly those who believe and do righteous deeds, those are the best of creationإِنَّ الَّذِيْنَ ءَامَنُوْا وَعَمِلُوْا الصَّالِحَاتِ أُلَآئِكَ هُمْ خَيْرُ الْبَرِيَّةِ