O you who believe! be careful of (your duty to) Allah and be with the true ones. 119 It was not for the people of Madina and those around them of the desert dwellers that they should lay behind the apostle of Allah, nor that they should prefer themselves before him. That is because there afflicteth them not thirst or fatigue or hunger in the way of Allah or they tread a place trodden on enraging the infidels, nor they attain an attainment from the enemy, but a good deed is thereby written down unto them. Verily Allah wasteth not the hire of the well-doers. 120 Nor do they spend anything that may be spent, small or great, nor do they traverse a valley, but it is written down to their credit, that Allah may reward them with the best of what they have done. 121 ۞ 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 their people when they return to them that they might be cautious. 122