If your wife is little, bend down and whisper to her
If your wife is little, bend down and whisper to her. By extension: listen to your wife's advice. Or: you must speak to every person 'at eye level' so that they will understand you (the original is in Aramaic below).
(And Rav said: Anyone who follows the advice of his wife falls into Gehenna, as it is said (I Kings 21): 'There was none like Ahab...' Rav Pappa said to Abaye: But people say: If your wife is short, bend down and whisper to her! — There is no contradiction: this applies to worldly matters, this to household matters. - Bava Metzia 59a)
Translation
Expression (Hebrew)
אִשְׁתְּךָ נְמוּכָה-גְּחַן וּלְחָשׁ לָהּ
Definition (Hebrew)
אִם אִשְׁתְּךָ נְמוּכָה גְּחַן וּלְחַשׁ לָהּ. בְּהַשְׁאָלָה: הַקְשֵׁב לַעֲצוֹתֶיהָ שֶׁל אִשְׁתְּךָ. אוֹ: עָלֶיךָ לְדַבֵּר עִם כָּל אָדָם 'בְּגֹבַהּ הָעֵינַיִם' כָּךְ שֶׁיָּבִין אוֹתְךָ (הַמָּקוֹר בַּאֲרָמִית לְהַלָּן).
("וְאָמַר רַב: כָּל הַהוֹלֵךְ בַּעֲצַת אִשְׁתּוֹ נוֹפֵל בַּגֵּיהִנֹּם, שֶׁנֶּאֱמַר (מְלָכִים א כא) רַק לֹא הָיָה כְּאַחְאָב וְגֵו', אָמַר לֵהּ רַב פפא לאביי: וְהָא אָמְרִי אִינָשֵׁי: איתתך גּוּצָא גחין וְתִלְחֹשׁ לָהּ! - לֹא קשיא, הָא - בְּמִלֵּי דְּעָלְמָא, וְהָא - בְּמִלֵּי דביתא"- בָּבָא מציעא נָט ע"א)