Cornelius Tacitus, Germany and its Tribes
Alfred John Church, William Jackson Brodribb, Ed.

A practice, rare among the other German tribes, and simply characteristic of individual prowess, has become general among the Chatti, of letting the hair and beard grow as soon as they have attained manhood, and not till they have slain a foe laying aside that peculiar aspect which devotes and pledges them to valour. Over the spoiled and bleeding enemy they show their faces once more; then, and not till then, proclaiming that they have discharged the obligations of their birth, and proved themselves worthy of their country and of their parents. The coward and the unwarlike remain unshorn. The bravest of them also wear an iron ring (which otherwise is a mark of disgrace among the people) until they have released themselves by the slaughter of a foe. Most of the Chatti delight in these fashions. Even hoary-headed men are distinguished by them, and are thus conspicuous alike to enemies and to fellow-countrymen. To begin the battle always rests with them; they form the first line, an unusual spectacle. Nor even in peace do they assume a more civilised aspect. They have no home or land or occupation; they are supported by whomsoever they visit, as lavish of the property of others as they are regardless of their own, till at length the feebleness of age makes them unequal to so stern a valour.