Havamal

a brother’s murderer, though on the high road met, a half-burnt house, an over-swift horse, (a horse is useless, if a leg be broken), no man is so confiding as to trust any of these.

Bróðurbana sínum þótt á brautu mœti húsi hálfbrunnu hesti alskjótum þá er jór ónýtr ef einn fótr brotnar verðit maðr svá tryggr at þessu trúi öllu

Havamal: 89, Dómi Oðins