Les Proverbes 31:26 Midrash : Ein Yaakov (Glick Edition), Midrash Tehillim, Shemot Rabbah & Sifrei Devarim

Our Rabbis were taught: "In three respects is loving kindness greater than charity: Charity is done at the mere sacrifice of money, while loving kindness is performed both with one's money and with one's person; charity is only for the poor, while loving kindness is for both the living and the dead." R. Elazar said: "One who does charity and justice is as if he filled the whole world with kindness; as it is said (Ps. 33, 50) He loveth righteousness and justice; the earth is full of the kindness of the Lord. You might then say that every one who desires [to do charity] is given the opportunity [to do real charity]; it is therefore said (Ib. 36, 8) How precious is Thy kindness O Lord! One may think that even a man who fears God is [given the opportunity]. It is therefore said (Ib. 103, 17) But the kindness of the Lord is from everlasting to everlasting over those that fear Him. Again said R. Elazar: "What is the meaning of the passage (Prov. 31, 26) She openeth her mouth with wisdom, and the law of kindness is on her tongue? Are there then two sets of laws, one of kindness, and one of unkindness? But this means that, if one studies law for its own sake, it becomes a law of kindness; but if one studies the law for his own interest, it becomes a law of unkindness." According to others: "If he studies the law to teach others, it becomes a law of kindness; but if he studies it for himself, it becomes a law of unkindness."

"Lest my enemy say, 'I have prevailed over him,' lest my foes rejoice because I have stumbled." The Lord said to David, "In what moment are you saying these things?" David replied, "I trust in Your mercy, as it is written in Psalm 13:6, 'But I trust in Your kindness; my heart will rejoice in Your deliverance.' The same kindness that is spoken of in Psalm 33:5, 'The Lord's kindness fills the earth,' and in Psalm 119:116, 'Sustain me as You promised, that I may live; do not disappoint me in my hope.' Another matter, I trust in Your mercy through the Torah, as it says in Proverbs 31:26, 'She opens her mouth with wisdom, and a lesson of kindness is on her tongue.' Let my heart rejoice in Your salvation." Rabbi Abbahu said, "This is one of the difficult verses, as the salvation of the Lord is the salvation of Israel. 'Let my heart rejoice in Your salvation' is written, not 'in our salvation.' David said, 'Your salvation is our salvation.'" Another matter, I trust in Your mercy even in Babylon. Let my heart rejoice in Your salvation in Media. "I will sing to the Lord for He has been good to me," as He has dealt graciously with me in Edom. Another matter, He said to Israel, "Pay me back for what I have done for you in this world, and I will repay you in the world to come. I told you to pour water before Me during the holiday, and I have preceded you, as it is written in Numbers 21:17, 'Then Israel sang this song: 'Spring up, O well! Sing to it!' And I will repay you, as it is written in Joel 4:18, 'And in that day the mountains shall drip with sweet wine.' I told you to take a palm branch and praise Me, and I have preceded you, as it is written in Psalm 114:6, 'The mountains skipped like rams, the hills like sheep.' And I will repay you in the future, as it is written in Isaiah 55:12, 'For you shall go out in joy, and be led forth in peace; the mountains and hills shall burst into song before you, and all the trees of the field shall clap their hands.' I told you to make a sukkah for Me, and I have preceded you, as it is written in Leviticus 23:43, 'So that your generations may know that I made the Israelite people live in sukkot when I brought them out of the land of Egypt.' And I will repay you in the future, as it is written in Isaiah 4:6, 'And there shall be a pavilion for shade by day from the heat, and for refuge and shelter from storm and rain.' 'Who has preceded Me, that I should pay him back?' I will sing to the Lord, for He has been good to me."

Another matter, “then Moses…sang” – that is what is written: “She opens her mouth with wisdom and the teaching of kindness is on her tongue” (Proverbs 31:26). From the day that the Holy One blessed be He created the world until Israel stood at the sea, we do not find a person who sang a song to the Holy One blessed be He other than Israel. He created Adam, the first man, and he did not recite song. He rescued Abraham from the fiery furnace and from the kings, and he did not recite song. Likewise, [He rescued] Isaac from the knife and he did not recite song. Likewise, [He rescued] Jacob from the angel, from Esau, and from the residents of Shekhem, and he did not recite song. When Israel came to the sea and it was split for them, they immediately sang a song before the Holy One blessed be He, as it is stated: “Then Moses and the children of Israel sang.” That is, “she opens her mouth with wisdom.” The Holy One blessed be He said: “I have been waiting for [people such as] these [to recite song].” Az means nothing other than rejoicing, as it is stated: “Then [az] our mouth will be filled with laughter” (Psalms 126:2).
Rabbi Yehuda ben Pazi said: What did Israel see, that led them to recite song with az? They said: ‘Initially, this sea was dry land, and the generation of Enosh arose and incensed Him with az, as it is stated: “Then [az] they began profaning the name of the Lord” (Genesis 4:26). The Holy One blessed be He rendered it [dry land] sea and exacted retribution against them, as it is stated: “Who calls the waters of the sea and pours them on the face of the earth” (Amos 5:8; 9:6). Now it was sea, and it was transformed to dry land on our behalf, as it is stated: “The children of Israel went on dry land in the midst of the sea” (Exodus 14:29). We will laud him with az because he transformed the sea into dry land; that is, “then Moses and the children of Israel sang.” Az means nothing other than security, as it is stated: “Then [az] you shall walk on your path securely” (Proverbs 3:23).