For the thirteenth I know, if on a young man I sprinkle water, he shall not fall, though he into battle come: that man shall not sink before swords.
Þat kann ek it þrettánda ef ek skal þegn ungan verpa vatni á munat hann falla þótt hann í fólk komi hnígra sá halr fyr hjörum
Havamal: 158, Ljóðatal