Midrash su Giudici 6:1

“Behind [mibaad] your braid” – Rabbi Levi said: Any bride whose eyes are ugly, her entire body requires examination. One whose eyes are beautiful, her entire body does not require examination. When a woman braids her hair behind her, it is an ornament for her. So was the Great Sanhedrin, which convened behind the Temple, and it was an ornament of the Temple. Rabbi Abbahu said: They appeared crowded, but it was spacious for them, as in the great colloquium in Tzippori. Rabbi Levi said: [The word mibaad] is Arabic. When he wants to say: Make room for me, he says: Maved li.
“Your hair is like a flock of goats that streams down [shegaleshu] from Mount Gilad” – the mountain from whose midst I directed away streams [shegalashti], I rendered a memorial [galed] for the nations of the world. Which is that? It is the Red Sea.¹⁰This is a reference to the splitting of the sea. Rabbi Yehoshua of Sikhnin said in the name of Rabbi Levi: The mountain from whose midst you streamed. When a woman’s hair grows too much, she thins it [galshin]. When the flame in a lamp burns too bright, one thins [the wick].¹¹These statements are cited in order to demonstrate that the root gimmel-lamed-shin means to thin out or strip away.
What is it that I took away [higlashti] from its midst? “Your teeth are like a flock of ordered [ketzuvot] ewes” – defined [ketzuvin] matters, the plunder of Egypt and the plunder of the sea. “That have come up from bathing” – Rabbi Abba bar Kahana said in the name of Rabbi Yehuda ben Rabbi Ilai: Before the song [of Deborah], it is written: “The children of Israel continued to do what was evil in the eyes of the Lord” (Judges 3:12). After the song it is written: “The children of Israel did what was evil in the eyes of the Lord” (Judges 6:1). Was this the beginning of their action?¹²Earlier it says they continued to do what was evil in the eyes of the Lord, indicating that they had already been doing so previously. But after the song it does not say they continued, rather only that they did what was evil in the eyes of the Lord, implying that this was the beginning of their evil behavior. It is because the song had already atoned for the past. On a similar note it says: “These are David’s last words” (II Samuel 23:1). The first ones, where are they? Rather, the song¹³The song of David (II Samuel chap. 22). atoned for the past.
“That are all paired [matimot]” – as they are all in the middle [metuamim] between the Divine Spirit and the angel. That is what is written: “The angel of God, who went before the camp of Israel, moved [and went behind them]” (Exodus 14:19). “And there is none missing among them” – that not one of them was harmed.

Another opinion. “The words of this song…” (Shmuel II 22:1) R’ Simon said: not all who say song say it. Rather, anyone for whom a miracle is done that then recites a song it is known that all their sins are forgiven and they become a new creation. Israel - when a miracle was done for them and they recited a song, all of their sins were forgiven, as it says “Then Moses caused Israel to set out…” (Shemot 15:22) He caused them to move on from their sins, “…from the Red Sea…” as it says “…they rebelled at the sea, at the Sea of Reeds.” (Psalms 106:7) So to you find in the days of Devorah and Barak – a miracle was done for them and they recited a song, as it says “On that day Deborah and Barak son of Abinoam sang…” (Shoftim 5:1) And from where do we learn that their sins were forgiven? Right after her song it says “Then the Israelites did what was offensive to the LORD…” (Shoftim 6:1) R’ Abahu said in the name of R’ Aba: everywhere else it is written ‘And the children of Israel continued to do evil…’ but after the song of Devorah it sis written ‘Then the Israelites did…’ which implies the beginning of an act. What happened to their earlier actions? It must be that the Holy One forgave them at the moment they recited a song. So too you find with David, that a miracle was done for him and he recited a song. And from where do we know that his sins were forgiven? Because it is written after his song “These are the last words of David…” (Shmuel II 23:1) And these are the first?! Rather it comes to teach us that the Holy One forgave him for the past.