O you who believe! be careful of (your duty to) Allah and be with the true ones. 119 It was not proper for the people of Madinah and those desert Arabs around them to hold back from following God's Messenger, and to prefer their own lives to his life. This is because whenever they suffer from thirst or weariness or hunger for God's cause, and whenever they take any step which provokes those who deny the truth, or inflicts any loss upon the enemy, it shall be counted as a good deed in the sight of God, God will not deny the righteous their reward, 120 Nor spend they any spending, small or great, nor do they cross a valley, but it is recorded for them, that Allah may repay them the best of what they used to do. 121 ۞ It is not possible for all believers to go out (to fight). So a part of each section (of the population) should go (to fight) in order that the others may acquire understanding of law and divinity, and warn their companions on return so that they may take heed for themselves. 122