﴿ ۞ أَلَمْ تَرَ إِلَى ٱلَّذِينَ تَوَلَّوْا۟ قَوْمًا غَضِبَ ٱللَّهُ عَلَيْهِم مَّا هُم مِّنكُمْ وَلَا مِنْهُمْ وَيَحْلِفُونَ عَلَى ٱلْكَذِبِ وَهُمْ يَعْلَمُونَ ﴾

“ART THOU NOT aware of those who would be friends with people whom God has condemned? They are neither of you [O believers] nor of those [who utterly reject the truth]: and so they swear to a falsehood the while they know [it to be false].”

Allah then said about 'Abdullah Ibn Ubayy and his host, because of their alliance with the Jews: (Hast thou not seen) O Muhammad (those who take for friends) for assistance and help (a folk) i.e. the Jews (with whom Allah is wroth? They) i.e. the hypocrites (are neither of you) in private such that what is due to you is due to them (nor of them) i.e. the Jews, openly such that whatever is due to the Jews is due to them, (and they swear a false oath) they falsely swear that they are believers and true in their faith (knowingly) while they know they are lying in their oath.