2 Timothy 2:4-6

BBE(i) 4 A fighting man, when he is with the army, keeps himself free from the business of this life so that he may be pleasing to him who has taken him into his army. 5 And if a man takes part in a competition he does not get the crown if he has not kept the rules. 6 It is right for the worker in the fields to be the first to take of the fruit.