O you who have believed, remember the favor of Allah upon you (33:9)

Almuntakhab Fi Tafsir Alquran Alkarim

O you people who have conformed to Islam. Recall your memory with the feeling of gratitude and gratefulness for the grace of Allah which was made to abound in you. You were confronted with and surrounded by the thickest troops of your enemies* and We sent against them a fierce wind. while camping around the trench, as well as invisible forces you did not see. Allah has Always been Bassirun and He keeps a vigilant eye upon everything and He sees all things

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(33:9) Believers, *18 call to mind Allah's favour to you when enemy hosts invaded you. Then We sent against them a wind and hosts that you did not see although *19 Allah was observing all that you were then doing.

O you who have believed, remember the favor of Allah upon you meaning

*18) In vv. 9-27 an appraisal has been made of the Battle of the Trench and the raid against the Bani Quraiz, ah and were revealed at the end of the raid. One should keep the details of these events in view as given in the Introduction above.
*19) The windstorm did not lash the enemy hordes immediately on their arrival but it occurred when the siege of Madinah had lasted about a month. "Armies which you could not see" implies the hidden powers which operate in the affairs of men under Allah's Command and of which men are wholly unaware. Man regards the occurrence of events and incidents as resulting from apparent causes and does not take into account the hidden forces at work, whereas in most cases these very hidden forces play the decisive role. As these forces function under the Command of Allah's angels, the "armies" may imply the angels as well though there is no indication here of sending the armies of the angels.
 

O you who have believed, remember the favor of Allah upon you meaning in Urdu

اے لوگو، جو ایمان لائے ہو، یاد کرو اللہ کے احسان کو جو (ابھی ابھی) اُس نے تم پر کیا ہے جب لشکر تم پر چڑھ آئے تو ہم نے اُن پر ایک سخت آندھی بھیج دی اور ایسی فوجیں روانہ کیں جو تم کو نظر نہ آتی تھیں اللہ وہ سب کچھ دیکھ رہا تھا جو تم لوگ اس وقت کر رہے تھے