The False Promise of Support the Hypocrites gave to the Jews

Allah states that the hypocrites, `Abdullah bin Ubayy and his like, sent a messenger to Bani An-Nadir promising them help. Allah the Exalted said,

أَلَمْ تَرَ إِلَى الَّذِينَ نَـفَقُواْ يَقُولُونَ لإِخْوَانِهِمُ الَّذِينَ كَفَرُواْ مِنْ أَهْلِ الْكِتَـبِ لَئِنْ أُخْرِجْتُمْ لَنَخْرُجَنَّ مَعَكُمْ وَلاَ نُطِيعُ فيكُمْ أَحَداً أَبَداً وَإِن قُوتِلْتُمْ لَنَنصُرَنَّكُمْ

كَمَثَلِ الشَّيْطَانِ إِذْ قَالَ لِلْإِنسَانِ اكْفُرْ‌ (The example [ of the hypocrites ] is like the Shaitan when he says to a human being, "Become a disbeliever" then once he disbelieves, he says, "I disown you; I fear Allah, the Lord of the worlds."....59:16) This is another example of the hypocrites who made false promises of solidarity and support to the Banu Nadir, and provoked the latter to fight against the Messenger of Allah ﷺ . But when the Muslims besieged them, not a single hypocrite came forward to assist. The Qur'an here uses a simile to illustrate the similarity between a hypocrite and the Shaitan. The Shaitan incited man to disbelieve and promised him the world, but when he was seriously involved in disbelief, he said that he has nothing to do with him. Only Allah knows how many such episodes the devil must have been involved in, textually, however, we find one such episode narrated in the Qur'an in Surah Anfal, verse [ 48]:

وَإِذْ زَيَّنَ لَهُمُ الشَّيْطَانُ أَعْمَالَهُمْ وَقَالَ لَا غَالِبَ لَكُمُ الْيَوْمَ مِنَ النَّاسِ وَإِنِّي جَارٌ‌ لَّكُمْ ۖ فَلَمَّا تَرَ‌اءَتِ الْفِئَتَانِ نَكَصَ عَلَىٰ عَقِبَيْهِ وَقَالَ إِنِّي بَرِ‌يءٌ مِّنكُمْ إِنِّي أَرَ‌ىٰ مَا لَا تَرَ‌وْنَ إِنِّي أَخَافُ اللَّـهَ ۚ وَاللَّـهُ شَدِيدُ الْعِقَابِ