Qalb (قَلْبِ)
The Centre of Self, Heart
الَّذِينَ يُجَادِلُونَ فِي آيَاتِ اللَّهِ بِغَيْرِ سُلْطَانٍ أَتَاهُمْ ۖ كَبُرَ مَقْتًا عِنْدَ اللَّهِ وَعِنْدَ الَّذِينَ آمَنُوا ۚ كَذَٰلِكَ يَطْبَعُ اللَّهُ عَلَىٰ كُلِّ قَلْبِ مُتَكَبِّرٍ جَبَّارٍ {35}
Those who dispute regarding the Signs of Allah without any authority given to them, (are committing) a hateful atrocity in the Presence of Allah and the presence of those who believe. Like that Allah Seals upon every ‘قَلْبِ’ heart of an arrogant tyrant [40:35]