وَقَالَت طَّائِفَةٌ مِّنْ أَهْلِ الْكِتَابِ آمِنُوا بِالَّذِي أُنزِلَ عَلَى الَّذِينَ آمَنُوا وَجْهَ النَّهَارِ وَاكْفُرُوا آخِرَهُ لَعَلَّهُمْ يَرْجِعُونَ (72)
(3:72) A party of the People of the Book said: 'Believe in the morning what has been revealed to those who believe, and then deny it in the evening that they may thus retract (from their faith).' *61
*61). This was one of the devices adopted by the leaders and rabbis of the Jews who lived on the outskirts of Madina in order to damage the mission of Islam. To demoralize the Muslims and create misgivings about the Prophet (peace be on him), they sent their agents to embrace Islam publicly, then to renounce it, and subsequently to go about telling people they had done so because of the faults they had found in Islam, the Muslims and their Prophet.