אִם־נָבַ֥לְתָּ בְהִתְנַשֵּׂ֑א וְאִם־זַ֝מּ֗וֹתָ יָ֣ד לְפֶֽה׃
Jeżeliś nisko postąpił, bądź w uniesieniu, bądź z namysłem - rękę na usta!
Rashi on Proverbs
If you have been put to shame, you will be in your ascendency If you were put to shame through your speech, that you derided yourself, you will ultimately ascend in the matter.
Rashi on Proverbs
and if you thought evil in your heart to quarrel, put your hand onto your mouth and remain silent.