[Machine] If there is a favor in the mortgage, and it is affected by a pandemic, then the mortgage remains with what it contains. But if it is not affected by a pandemic, then the favor is returned. This is narrated by Khalas from Ali, who took it from a document. Yahya bin Ma'in and others from the preservers have also narrated it, and it is narrated from Ali in an absolute manner that favors are mutually exchanged.  

إِذَا كَانَ فِي الرَّهْنِ فَضْلٌ فَإِنْ أَصَابَتْهُ جَائِحَةٌ فَالرَّهْنُ بِمَا فِيهِ فَإِنْ لَمْ تُصِبْهُ جَائِحَةٌ فَإِنَّهُ يَرُدُّ الْفَضْلَ مَا رَوَى خِلَاسٌ عَنْ عَلِيٍّ أَخَذَهُ مِنْ صَحِيفَةٍ قَالَهُ يَحْيَى بْنُ مَعِينٍ وَغَيْرُهُ مِنَ الْحُفَّاظِ وَرُوِيَ عَنْ عَلِيٍّ ؓ مُطْلَقًا يَتَرَادَّانِ الْفَضْلَ