Havamal

Of his understanding no one should be proud, but rather in conduct cautious. When the prudent and taciturn come to a dwelling, harm seldom befalls the cautious; for a firmer friend no man ever gets than great sagacity.

At hyggjandi sinni skylit maðr hrœsinn vera heldr gætinn at geði þá er horskr ok þögull kømr heimisgarða til sjaldan verðr viti vörum því at óbrigðra vin fær maðr aldregi en manvit mikit

Havamal: 6, Gestaþáttr