﴿ ۞ 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].”

The hypocrites of Madinah, who were at that time living in the community of Islam, joined hands with other hostile tribes. This is always true of those who are unable to accept the Truth whole-heartedly. Such people are apparently in consonance with everyone else but, in reality, they are loyal only to their own interests, despite having given assurances on oath of their being devotees of the Truth.