Believers, have fear of God and always be friends with the truthful 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 do they spend an expenditure, small or large, or cross a valley but that it is registered for them that Allah may reward them for the best of what they were doing. 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