The Story of the Volsungs and Niblungs. The Harvard Classics. 190914.
The Story of the Volsungs and Niblungs
XLIII. The Latter End of all the Kin of the Giukings
NOW telleth the tale concerning the sons of Gudrun, that she had arrayed their war-raiment in such wise, that no steel would bite thereon; and she bade them play not with stones, or other heavy matters, for that it would be to their scathe if they did so.
Now in this must they turn away from the words of their mother, whereas they had to deal with stones. For now men fell on them, and they defended themselves in good and manly wise, and were the scathe of many a man, nor would iron bite on them.