גַּ֣ם בְּמַדָּֽעֲךָ֗ מֶ֚לֶךְ אַל־תְּקַלֵּ֔ל וּבְחַדְרֵי֙ מִשְׁכָּ֣בְךָ֔ אַל־תְּקַלֵּ֖ל עָשִׁ֑יר כִּ֣י ע֤וֹף הַשָּׁמַ֙יִם֙ יוֹלִ֣יךְ אֶת־הַקּ֔וֹל וּבַ֥עַל הכנפים [כְּנָפַ֖יִם] יַגֵּ֥יד דָּבָֽר׃
Ni aun en tu pensamiento digas mal del rey, ni en los secretos de tu cámara digas mal del rico; porque las aves del cielo llevarán la voz, y las que tienen alas harán saber la palabra.
Pirkei Avot
He used to say: do His will as though it were your will, so that He will do your will as though it were His. Set aside your will in the face of His will, so that he may set aside the will of others for the sake of your will. Hillel said: do not separate yourself from the community, Do not trust in yourself until the day of your death, Do not judge your fellow man until you have reached his place. Do not say something that cannot be understood [trusting] that in the end it will be understood. Say not: ‘when I shall have leisure I shall study;’ perhaps you will not have leisure.