"Az Yashir"

(א) אָ֣ז יָשִֽׁיר־מֹשֶׁה֩ וּבְנֵ֨י יִשְׂרָאֵ֜ל אֶת־הַשִּׁירָ֤ה הַזֹּאת֙ לַֽה' וַיֹּאמְר֖וּ לֵאמֹ֑ר אָשִׁ֤ירָה לַֽה' כִּֽי־גָאֹ֣ה גָּאָ֔ה ס֥וּס וְרֹכְב֖וֹ רָמָ֥ה בַיָּֽם׃

Exodus 15:1

(1) Then Moses and the Israelites sang this song to the LORD. They said: I will sing to the LORD, for He has triumphed gloriously; Horse and driver He has hurled into the sea.

What is the difference between a song and a speech?

אבן עזרא על שמות ט״ו:א׳:ב׳

(א) ויאמרו לאמר. כל א' וא' ככה. או בכל דור ודור

Ibn Ezra on Exodus 15:1:2

Each and every person (should say it) like this. Or (another explanation) In each and every generation. (It should be said).

רש"י על שמות ט״ו:א׳:ב׳

(א).... דָּבָר אַחֵר – כי גאה גאה, עַל כָּל הַשִּׁירוֹת וְכָל מַה שֶּׁאֲקַלֵּס בּוֹ, עוֹד יֵשׁ בּוֹ תּוֹסֶפֶת, וְלֹא כְמִדַּת מֶלֶךְ בָּשָׂר וָדָם שֶׁמְּקַלְּסִין אוֹתוֹ וְאֵין בּוֹ:

Rashi on Exodus 15:1:2

(1) כי גאה גאה FOR HE IS GLORIOUSLY SUBLIME — ... Another explanation of כי גאה גאה: I will sing unto the Lord although (כי) He is exalted high above all songs and however much I may praise Him there will still remain something additional in Him to be praised (עוד יש בו תוספת — I can never exhaust his praises), and not as is the practice in respect to a human king whom one praises, attributing to him certain virtues whilst these are really not in him (cf. Mekhilta d'Rabbi Yishmael 15:1:6).

שבת קי״ח ב:ה׳

א"ר יוסי יהא חלקי מגומרי הלל בכל יום איני והאמר מר הקורא הלל בכל יום הרי זה מחרף ומגדף כי קאמרינן בפסוקי דזמרא

Shabbat 118b:5

Rabbi Yosei said: May my portion be among those who complete hallel every day. The Gemara is surprised at this: Is that so? Didn’t the Master say: One who reads hallel every day is tantamount to one who curses and blasphemes God. He displays contempt for hallel by not reserving it for days on which miracles occurred. The Gemara answers: When we say this statement of Rabbi Yosei, we are referring to the verses of praise [pesukei dezimra], recited during the morning service, not to hallel (Psalms 113–118) recited on special days.

What is so bad about saying Hallel every day?
How is this Gemara connected to the next Gemara?

ברכות ל״ג ב:כ״ב

המתין לו עד דסיים כי סיים א"ל סיימתינהו לכולהו שבחי דמרך למה לי כולי האי אנן הני תלת דאמרינן אי לאו דאמרינהו משה רבינו באורייתא ואתו אנשי כנסת הגדולה ותקנינהו בתפלה לא הוינן יכולין למימר להו ואת אמרת כולי האי ואזלת משל למלך בשר ודם שהיו לו אלף אלפים דינרי זהב והיו מקלסין אותו בשל כסף והלא גנאי הוא לו:

Berakhot 33b:22

Rabbi Ḥanina waited for him until he completed his prayer. When he finished, Rabbi Ḥanina asked him: Have you concluded all of the praises of your Master? Why do I need all of this superfluous praise? Even these three praises that we recite: The great, mighty and awesome, had Moses our teacher not said them in the Torah and had the members of the Great Assembly not come and incorporated them into the Amida prayer, we would not be permitted to recite them. And you went on and recited all of these. It is comparable to a king who possessed many thousands of golden dinars, yet they were praising him for silver ones. Isn’t that deprecatory? All of the praises we could possibly lavish upon the Lord are nothing but a few silver dinars relative to many thousands of gold dinars. Reciting a litany of praise does not enhance God’s honor.

Have you ever felt the desire to praise someone but could not find the suitable words?
Imagine someone attempts to praise someone you know better than anyone, what feeling would you have?

ספורנו על שמות ט״ו:ב׳:ד׳

(ב) ואנוהו אעשה נוה לשכנו בתוכנו, ובו אתפלל אליו בלבד ואעבוד כראוי למטיב ומריע, כאמרו ויתפלל אליו ויאמר הצילני כי אלי אתה, כי אמנם העבודה והתפלה מכוונים למצא חן:

Sforno on Exodus 15:2:4

(2) ואנוהו, I will erect a suitable residence for Him in our midst. Within (that "residence") I shall pray to Him exclusively and I will serve Him as is befitting to the One Who bestows both goodness and punishes the derelict. (compare Isaiah 44,17. ויתפלל אליו ויאמר הצילני נא כי א-לי אתה, “He prayed to Him, saying: ‘save me for You are my G’d.’”) Both prayer and service (sacrifices, etc.) have as their purpose to find favor in the eyes of the Lord.