يَا أَيُّهَا الَّذِينَ آمَنُوا اذْكُرُوا نِعْمَةَ اللَّهِ عَلَيْكُمْ إِذْ جَاءَتْكُمْ جُنُودٌ فَأَرْسَلْنَا عَلَيْهِمْ رِيحًا وَجُنُودًا لَمْ تَرَوْهَا وَكَانَ اللَّهُ بِمَا تَعْمَلُونَ بَصِيرًا ﴿۹﴾ إِذْ جَاءُوكُمْ مِنْ فَوْقِكُمْ وَمِنْ أَسْفَلَ مِنْكُمْ وَإِذْ زَاغَتِ الْأَبْصَارُ وَبَلَغَتِ الْقُلُوبُ الْحَنَاجِرَ وَتَظُنُّونَ بِاللَّهِ الظُّنُونَا ﴿۱۰﴾ هُنَالِكَ ابْتُلِيَ الْمُؤْمِنُونَ وَزُلْزِلُوا زِلْزَالًا شَدِيدًا ﴿۱۱﴾

﴾9﴿ Yaaa aiyuhal lazeena aamanuz kuroo ni'matal laahi 'alaikum iz jaaa'atkum junoodun fa arsalnaa 'alaihim reehanw wa junoodal lam tarawhaa; wa kaanal laahu bimaa ta'maloona Baseera
﴾10﴿ Iz jaaa'ookum min fawqikum wa min asfala minkum wa iz zaaghatil absaaru wa balaghatil quloobul hanaajira wa tazunnoona billaahiz zunoonaa
﴾11﴿ Hunaalikab tuliyal mu'minoona wa zulziloo zilzaalan shadeedaa

﴾9﴿ O believers! Remember the blessing of Allah Almighty upon you when armies came upon you, and We sent against them a wind and armies (of angels) that you did not see. And Allah Almighty is ever-seeing of your deeds
﴾10﴿ And when they came upon you from above you and from below you, and when your eyes grew wild (in fear) and your hearts reached your throats, and you began to think thoughts about Allah
﴾11﴿ At that time, the believers were tested and were shaken with a severe shaking

[9] From this verse until verse 28 is the second section, which includes two addresses to the believers (in verses 9 and 21).
Between these, the contrast between the state of the believers and the hypocrites is mentioned, along with fourteen vices of the hypocrites.
Glad tidings are given to the believers of divine help and victory in the Battle of Khandaq and the Battle of Banu Qurayzah.
In verse 9, which is the third address to the believers, the essence of the message is: obey and honor this Prophet (May Allah bless him and give him peace), because through his obedience, Allah has aided you.
Do not follow the hypocrites, because they abandoned you during the Battle of Khandaq.
In the verses related to the Battle of Khandaq — also called the Battle of the Confederates (Ghazwah al-Aḥzāb) — it is mentioned that in the 4th year after Hijrah, the Quraysh, Ghatafān, and the Jews of Banū Qurayzah all united in their intention to attack Madinah.
To protect Madinah, the Prophet (May Allah bless him and give him peace), upon the advice of Salmān al-Fārsī (may Allah be pleased with him), along with the Companions, dug a trench.
Many miracles were manifested during this effort.
The Muslim army was around three thousand strong, and for about a month, no actual battle occurred, except occasional exchanges of arrows and stones.
Eventually, Allah sent the east wind (ṣabā) that uprooted their tents, extinguished their fires, overturned their pots, and scattered their supplies.
Angels were also sent down, who recited takbīr (Allahu Akbar) near them, causing the enemy to flee without fighting.
The disbelievers fled in fear, leaving behind their belongings and provisions.
[10] In this verse, it describes the awe and severity of that moment when the tribe of Ghaṭafān approached from the higher part of Madinah — that is, from the east — and the Quraysh came from the lower part of Madinah, meaning from the west.
"Al-ẓunūnā" refers to various assumptions and thoughts:
The believers believed that Allah would fulfill His promise and complete the dominance of His religion, but they feared their own impatience during the test.
The hypocrites, on the other hand, assumed that this Prophet was not truthful, because such a great calamity had befallen him, and (in their view) Allah was not helping him.
[11] This too is a reference to the intensity of that situation.
However, such hardship for the sincere believers is a trial (ibtīlā’), not a punishment — and trials are a means of raising ranks.
The effect of a trial is upon the heart and inner strengths, while the effect of an earthquake (zilzāl) is upon the outer limbs and body.
Yet in both conditions, the believer remains steadfast and does not turn away from his religion.