سَيَحْلِفُوْنَ بِاللّٰهِ لَكُمْ اِذَا انْقَلَبْتُمْ اِلَيْهِمْ لِتُعْرِضُوْا عَنْهُمْ ۗ فَاَعْرِضُوْا عَنْهُمْ ۗ اِنَّهُمْ رِجْسٌۙ وَّمَأْوٰىهُمْ جَهَنَّمُ جَزَاۤءً ۢبِمَا كَانُوْا يَكْسِبُوْنَ ( التوبة: ٩٥ )
Sa yahlifoona billaahi lakum izanqalabtum ilaihim litu'ridoo 'anhum fa a'ridoo 'anhum innahum rijsunw wa maawaahum jahannamu jazaaa 'ambimaa kaanoo yaksiboon (at-Tawbah 9:95)
They will swear by Allah to you when you return to them that you would leave them alone. So leave them alone; indeed they are evil; and their refuge is Hell as recompense for what they had been earning. (At-Tawbah  : 95)
1 Mufti Taqi Usmani
They will swear by Allah before you when you will go back to them, so that you may ignore their misdeeds. So, just ignore them. They are filth, and their abode is Jahannam, a recompense for what they used to do.