And with all these things, it is necessary to explain the connection and relationship between the song and the Mashiach, as we find in the Gemara (Sanhedrin 94a): "Of the increase of his government and peace there shall be no end, etc." Rabbi Tanchum said, Bar Kappara expounded in Tzipori, why is every 'mem' in the middle of a word open, and this one closed? The Holy One, blessed be He, wanted to make Hezekiah the Mashiach and Sennacherib Gog and Magog. The Attribute of Justice said before the Holy One, blessed be He, "Master of the Universe, if David, King of Israel, who said many songs and praises before You, was not made the Mashiach, should Hezekiah, for whom You performed all these miracles and did not sing before You, be made the Mashiach?" Thus, it was sealed, etc. (end quote).

Also, in the language of the verse that opens the Song of the Sea: "Then Moses and the children of Israel sang this song to Hashem, etc." – we find the connection between the song and the days of the Mashiach. For on the word 'yashir,' which is said in the future tense, the Gemara (Sanhedrin 91b) says the following: It is taught, Rabbi Meir said, from where is the resurrection of the dead derived from the Torah? As it is said: "Then Moses and the children of Israel sang this song to Hashem" – it is not written 'sang' (past tense) but 'will sing' (future tense), from here is the resurrection of the dead derived from the Torah. (end quote). And similarly, it is said in the Zohar (54a) that Moses is destined to sing in the future, and therefore it is written 'will sing' (yashir).

And see in Kaf HaChaim (Siman 51, Seif Katan 41) in the name of the Zohar, that one who says the Song of the Sea with joy in this world will merit to say it when our righteous Mashiach arrives.

And it is worth contemplating the reason for this – why is one who sings a song worthy of being made the Mashiach? Why is Moses destined to sing a song at the coming of the Mashiach? And why is the reward for saying the song with joy its recitation in the days of the Mashiach? Indeed, according to our path, it is understood that since in the days of the Mashiach, Hashem will be one and His name one, and the whole world will recognize the truth of His existence, automatically, all souls will be filled with immense happiness, and this will burst forth and pour out from them in a wellspring of song and praise. And since the days of the Mashiach will be days of song, it is fitting to once again sing songs in those days and to designate them for rewarding those who sing.