بِالدِّيْنِ

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

PhraseParticle / NounNoun Particle
شِبْهُ الجُمْلَةِجَارٌ وَمَجْرُوْرٌاسْمٌ مَجْرُوْرٌحَرْفُ جَرٍّ
PhraseCompoundGenitive NounParticle of pulling down/Preposition
  
the religion?بِالدِّيْنِ=الدِّيْنِ+بِ
the religionthe religion
Surah/Below are the 3 verses in the holy Quran containing the compoundبِالدِّيْنِ
Verse
82-9Nay! but you deny the judgementكَلَّا بَلْ تُكَذِّبُوْنَ بِالدِّيْنِ
95-7So, what makes you deny the final requital?فَمَا يُكَذِّبُكَ بَعْدُ بِالدِّيْنِ
107-1Have you seen him who denies the judgement?أَرَءَيْتَ الَّذِي يُكِذِّبُ بِالدِّيْنِ