۞ وَمَا كَانَ ٱلْمُؤْمِنُونَ لِيَنفِرُوا۟ كَآفَّةً ۚ فَلَوْلَا نَفَرَ مِن كُلِّ فِرْقَةٍ مِّنْهُمْ طَآئِفَةٌ لِّيَتَفَقَّهُوا۟ فِى ٱلدِّينِ وَلِيُنذِرُوا۟ قَوْمَهُمْ إِذَا رَجَعُوٓا۟ إِلَيْهِمْ لَعَلَّهُمْ يَحْذَرُونَ
wamā kāna l-mu'minūna liyanfirū kāffatan falawlā nafara min kulli fir'qatin min'hum ṭāifatun liyatafaqqahū fī l-dīni waliyundhirū qawmahum idhā rajaʿū ilayhim laʿallahum yaḥdharūna
And it is not for the believers to go forth [to battle] all at once. For there should separate from every division of them a group [remaining] to obtain understanding in the religion and warn [i.e., advise] their people when they return to them that they might be cautious.
— Saheeh International
Yet it is not right for all the believers to go out [to battle] together: out of each community, a group should go out to gain understanding of the religion, so that they can teach their people when they return and so that they can guard themselves against evil.
— M. A. S. Abdel Haleem
And it is not (proper) for the believers to go out to fight (Jihâd ) all together. Of every troop of them, a party only should go forth, that they (who are left behind) may get instructions in (Islâmic) religion, and that they may warn their people when they return to them, so that they may beware (of evil).
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali