مِنَ الأُوْلَى

مِنَ الأُوْلَى is a phrase (شِبْهُ الجُمْلَةِ) a compound consisting of a particle followed by noun.

Particle/NounNoun Particle 
شِبْهُ الجُمْلَةِجَارٌ وَمَجْرُوْرٌاسْمٌ مَجْرُوْرٌحَرْفُ جَرٍّ
PhraseCompoundGenitive NounParticle of pulling down
  
than the firstمِنَ الأُوْلَى=الأُوْلَى+مِنَ
than the priorthe prior (first, present)than
Surah/Below is the only verse in the holy Quran containing the compoundمِنَ الأُوْلَى
Verse
93-4And verily the hereafter is better for you than the presentوَلَلْآخِرَةُ خَيْرٌ لَّكَ مِنَ الْأُوْلَى