They swear by God that they belong with you, while they do not belong with you; they are divisive people.
وَيَحلِفونَ بِاللَّهِ إِنَّهُم لَمِنكُم وَما هُم مِنكُم وَلٰكِنَّهُم قَومٌ يَفرَقونَ
wa yahlifoona billaahi innnahum laminkum wa maa hum minkum wa laakinnahum qawmuny yafraqoon