فِي كَبَدٍ

فِي كَبَدٍ is a phrase (شِبْهُ الجُمْلَةِ) consisting of a particle of pulling down (preposition) and a genitive noun

PhraseParticle / NounNoun Particle
شِبْهُ الجُمْلَةِجَارٌ وَمَجْرُوْرٌاسْمٌ مَجْرُوْرٌحَرْفُ جَرٍّ
PhraseCompoundGenitive NounParticle of pulling down
  
in toilفِي كَبَدٍ=كَبَدٍ+فِي
in hardshiphardship, toil, distressin
Surah/Below is the only verse in the holy Quran containing the preposition and genitive noun compoundفِي كَبَدٍ
Verse
90-4Indeed, we have created man in toilلَقَدْ خَلَقْنَا الإِنْسَانَ فِي كَبَدٍ