Al-Baqara · 2:10

ف۪ي قُلُوبِهِمْ مَرَضٌۙ فَزَادَهُمُ اللّٰهُ مَرَضًاۚ وَلَهُمْ عَذَابٌ اَل۪يمٌۙ بِمَا كَانُوا يَكْذِبُونَ

There is a disease in their hearts, to which God has added more: agonizing torment awaits them for their persistent lying

ف۪ي
Meaning
in
Part of speech
Preposition (حرف جر)
Role
Fronted predicate: ‘in their hearts [is]…’
Governor
governs ‘qulūbihim’
Case
Particle (mabnī)
Grammar
‘In’ — opens a nominal sentence with the predicate first: ‘in their hearts is a disease.’ It puts ‘their hearts’ into the genitive.