إِذْ يُغَشِّيكُمُ ٱلنُّعَاسَ أَمَنَةًۭ مِّنْهُ وَيُنَزِّلُ عَلَيْكُم مِّنَ ٱلسَّمَآءِ مَآءًۭ لِّيُطَهِّرَكُم بِهِۦ وَيُذْهِبَ عَنكُمْ رِجْزَ ٱلشَّيْطَٰنِ وَلِيَرْبِطَ عَلَىٰ قُلُوبِكُمْ وَيُثَبِّتَ بِهِ ٱلْأَقْدَامَ
[Remember] when He overwhelmed you with drowsiness [giving] security from Him and sent down upon you from the sky, rain by which to purify you and remove from you the evil [suggestions] of Satan and to make steadfast your hearts and plant firmly thereby your feet.
The fourth verse (10) restates this aspect explicitly by saying: وَمَا جَعَلَهُ اللَّـهُ إِلَّا بُشْرَىٰ وَلِتَطْمَئِنَّ بِهِ قُلُوبُكُمْ. It means: 'Allah has done it only to give you glad tidings and so that your hearts might be at rest thereby.'
The number of angels sent to support Muslims in the battle of Badr has been given as one thousand at this place, while in Surah 'Al-` Imran (3:124) the number mentioned is three thousand and five thousand. The reason for this lies in three different promises made under different circumstances. The first promise was that of one thousand angels, the reason for which was the prayer of the Holy Prophet ﷺ and the supporting plaint of common Muslims with him. The second promise of three thousand angels which appears first in Surah 'Al-` Imran was made at a time when Muslims heard about the additional forces coming to join the Quraysh army. It has been reported in Ruh al-Ma'ani as based on a narration of Al-Sha'bi from Ibn Abi Shaybah, Ibn al-Mundhir and others that on the day of the battle of Badr when Muslims heard that Kurz ibn Jabir Muharibi was coming with additional armed support for the disbelievers, they were disturbed and agitated. Thereupon, the verse of 'Al-` Imran: أَلَن يَكْفِيَكُمْ أَن يُمِدَّكُمْ رَبُّكُم بِثَلَاثَةِ آلَافٍ مِّنَ الْمَلَائِكَةِ مُنزَلِينَ : "Shall it not suffice you that your Lord should help you with three thousand of the angels sent down (for you)?" - 3:124) was revealed and referred to wherein is the promise of sending a force of three thousand angels from the heavens in order to support believers.
As for the third promise of five thousand, it was made subject to the condition that should the enemy launch a sudden offensive, a supporting force of five thousand angels will be sent down. That promise appears in the verse which follows verse 124 of Surah 'Al-` Imran (3) cited immediately above. Given here are the words in which it has been mentioned:
بَلَىٰ ۚ إِن تَصْبِرُوا وَتَتَّقُوا وَيَأْتُوكُم مِّن فَوْرِهِمْ هَـٰذَا يُمْدِدْكُمْ رَبُّكُم بِخَمْسَةِ آلَافٍ مِّنَ الْمَلَائِكَةِ مُسَوِّمِينَ ﴿125﴾
"Why not? If you stay patient and fear Allah and they come upon you even in this heat of theirs, your Lord will reinforce you with five thousand of the angels having distinct marks" (3:125).
Some Commentators have said that this promise had three conditions: (1) Fortitude, (2) Taqwa or fear of Allah and (3) Sudden and all-out attack by the opposing forces. Out of these, the first two conditions were already fulfilled by the noble Companions ؓ for no departure from these was witnessed in this battlefield from the beginning to the end.
But, what did not take place was the third condition of a sudden attack. Therefore, things did not reach the point where the army of five thousand angels was to be inducted.
So, this matter remained revolving between one and three thousand which also lends to the probability that the figure of three thousand may mean the one thousand sent earlier to which an additional force of two thousand was added and made to be three thousand - and it is also probable that these three thousand were in addition to the first one thousand.
At this …