וַיָּבֹ֨א מֹשֶׁ֣ה וְאַהֲרֹן֮ אֶל־פַּרְעֹה֒ וַיֹּאמְר֣וּ אֵלָ֗יו כֹּֽה־אָמַ֤ר יְהוָה֙ אֱלֹהֵ֣י הָֽעִבְרִ֔ים עַד־מָתַ֣י מֵאַ֔נְתָּ לֵעָנֹ֖ת מִפָּנָ֑י שַׁלַּ֥ח עַמִּ֖י וְיַֽעַבְדֻֽנִי׃
Então Moshe e Aharon foram até Paró e disseram-lhe: "Assim diz o Senhor, o Deus dos hebreus: 'Até quando você se recusa a humilhar-se diante de Mim? Liberte o Meu povo para que eles possam Me servir.
Reshit Chokhmah
The Explanation of the Word 'Anava' (Humility) and its Qualities: To explain humility, we refer to one who is 'Ani' (poor) and 'Inui' (tortured) in a way that he is surrendered. It is the concept of being poor and dependant [meaning, he will accept anything that comes his way]. So too (as in Parshat Shemot 10:3), "מאנת לענות מפני," from the Targaminan, "לאתכנעא." So too, this applies to a poor person and one who is fasting, as it says, "וכי התענית בכל אשר התענה אבי," and from this we can take that in all of these, the intention of them is the level of surrender.