a fool knows more in his own house than a wise man in another

US /ə ˈfuːl noʊz ˌmɔːr ɪn hɪz oʊn ˈhaʊs ðæn ə ˈwaɪz mæn ɪn əˈnʌð.ər/
"a fool knows more in his own house than a wise man in another" picture
1.

愚者は自分の家のことなら賢者が他所の家のことより多くを知っている