Shofar, harps, drums, cymbals. So where is the band?
This psalm calls for a shofar, lyres and harps, a drum, dancing, cymbals and a few instruments nobody can identify anymore. Then you look around shul. Nobody is holding anything but a siddur.
The band was real. Ibn Ezra quotes Rabbi Yehudah HaLevi: the psalm is speaking to the Levites, who sang in the Temple with lyres and every kind of music. The Mishnah (the core text of the Oral Torah) gives numbers. Never fewer than two nevel lyres and never more than six. At least two trumpets, at least nine kinor harps, and one cymbal.
Then the Temple was destroyed. The Rambam records that the Sages decreed against playing instruments, and against enjoying or listening to music, because of the destruction. The Shulchan Aruch (the main code of Jewish law) repeats it. The Rema (Rabbi Moshe Isserles of Krakow, 1500s) adds two limits. Some say the decree is only for people who live with music the way kings do, or for parties. And for a mitzvah, such as a wedding, all of it is allowed. Shabbat has its own rule, in the Halacha cards.
The Rambam also notes what Jews kept doing even under the decree: everyone sings songs of praise and thanks to God over wine.
And the Temple itself had a priority. The Gemara asks whether its song was mainly the voice, with instruments to sweeten the sound, or mainly the instruments. The Rambam rules for the voice. The Levites' song was sung by mouth, he writes, and others stood nearby and played.
The psalm ends the same way. After the last cymbal comes "Let every soul praise God," and no instrument is named. Ibn Ezra quotes a Rabbi Yehudah: a musician's tune changes with his breath, how long it lasts, how high, how low, how fast. So the psalm closes with the breath. Radak says the praise of the soul is above all the others: thinking about what God does, and knowing Him as far as a soul in a body can.
Ibn Ezra on Tehillim 150:1 and 150:6,Mishnah Arakhin 2:3 and 2:5,Rambam, Laws of Fasts 5:14,Shulchan Aruch and Rema, Orach Chaim 560:3,Arakhin 11a,Rambam, Laws of the Temple Vessels 3:3,Radak on Tehillim 150:4 and 150:6Praise Him as much as He is great? Who could do that?
Verse 2 says: "Praise Him according to His abundant greatness." Ibn Ezra reads it simply: praise Him a lot, because His greatness is a lot. But a few minutes ago, in Ashrei, you said His greatness has no limit. So how much praise would be enough?
The Gemara tells about someone who tried. A man led the prayers in front of Rabbi Chanina. He began, "The great, mighty and awesome God," and kept adding: powerful, strong, sure, honored. Rabbi Chanina waited until he was done. Then he asked: "Have you finished all the praises of your Master?"
He gave a comparison. A king owns a thousand thousand gold coins, and people praise him for having silver. That is an insult. Even the three words we do say, Rabbi Chanina added, we could not say on our own. Moshe said them in the Torah, and the men of the Great Assembly (the early sages who set the prayers) put them into the Amidah.
Another passage goes further. Who is fit to tell of God's mighty acts? Only someone who could tell all of His praise. It quotes a verse from Tehillim, "To You, silence is praise," and sums up: the best medicine of all is silence.
So is a psalm with all these calls to praise a mistake? The Shulchan Aruch draws a line. Inside the Amidah, nobody adds titles for God beyond the three the Sages fixed. In requests and praises a person says on his own, that rule does not apply. Then it adds: someone who wants to praise God at length does well to do it in verses. That describes Pesukei DeZimra. The words come from Tanach. Nobody is inventing titles.
Ibn Ezra ends his whole commentary on Tehillim at this psalm's last verse, with a rhyme of his own. The book of praises is finished and complete. But the praises of God never end, and who could begin them and finish them?
Ibn Ezra on Tehillim 150:2 and 150:6,Tehillim 145:3,Berakhot 33b,Megillah 18a,Shulchan Aruch, Orach Chaim 113:9Angels, Levites, a full band. Where do I come in?
Read the psalm as a list of who is being told to praise, and you may not find yourself on it.
Verse 1: "Praise God in His holy place. Praise Him in the sky of His strength." Radak, Metzudat David (a commentary from the 1700s) and Meiri (Rabbi Menachem Meiri, Provence, around 1300) read the holy place as the world of the angels. Meiri reads the sky as the spheres that carry the stars. Ibn Ezra brings another view, from Rabbi Yehudah HaLevi: the holy place is the Temple, and the psalm is speaking to the Levites.
Verse 2 comes down to earth. "Praise Him for His mighty acts." Radak: this is said to Israel. Meiri: for the wonders He did for us and keeps doing. Then come the instruments. Meiri says they are there to wake up people's hearts, so the praise comes with extra love.
So far that is angels, a nation and a Temple orchestra. The last verse has no list: "Let every soul praise God." Metzudat David reads it as wide as it sounds: everyone who has a soul and a mind. Abudarham (a classic commentary on the prayers, Spain, about 1340) comes at it from another side. He matches this psalm to the moment in creation when God said "Let us make a human," because of all the creatures, only the one who speaks knows how to praise.
There are other readings of that verse. A Midrash hears "every breath": for each breath a person takes, he should praise the Creator. Meiri reads it as a direction: let all the praise come from the soul, with the World to Come in mind.
On Metzudat David's reading, though, the last verse is where the psalm stops being about someone else. It asks for no Temple and no instrument. It names one thing, and every reader has it.
Radak, Meiri, Metzudat David and Ibn Ezra on Tehillim 150,Abudarham, Songs of Praise,Bereishit Rabbah 14:9