וְעַתָּ֕ה אֱמֶ֖ת אַגִּ֣יד לָ֑ךְ הִנֵּה־עוֹד֩ שְׁלֹשָׁ֨ה מְלָכִ֜ים עֹמְדִ֣ים לְפָרַ֗ס וְהָֽרְבִיעִי֙ יַעֲשִׁ֤יר עֹֽשֶׁר־גָּדוֹל֙ מִכֹּ֔ל וּכְחֶזְקָת֣וֹ בְעָשְׁר֔וֹ יָעִ֣יר הַכֹּ֔ל אֵ֖ת מַלְכ֥וּת יָוָֽן׃
Y ahora yo te mostraré la verdad. He aquí que aun habrá tres reyes en Persia, y el cuarto se hará de grandes riquezas más que todos; y fortificándose con sus riquezas, despertará á todos contra el reino de Javán.
Ibn Ezra
[Daniel 10:21] “No one is helping me against them except your prince, Michael” (וְאֵין אֶחָד מִתְחַזֵּק עִמִּי עַל־אֵלֶּה כִּי אִם־מִיכָאֵל שַׂרְכֶם - v'ein echad mit'chazek immi al-elleh ki im Mikha'el sarkhem): And the meaning is: If he [Michael] helped me now when I fought with the Prince of Persia, I also helped him [in the past] against the Prince of the Chaldeans, at the time when Darius the Mede reigned, as it is written: “And Darius the Mede received the kingdom” [Daniel 6:1]. And this refers to [what the angel says later]: “And I, in the first year of Darius the Mede, stood up to confirm and strengthen Michael” [Daniel 11:1]. And the proof that these are the words of the angel [continuing from the previous chapter and into the next] is that afterwards it is written [starting Daniel 11:2]: “And now, truth...”. One might wonder about [the structure of] the verse [i.e., the apparent interruption]. If an objector argues, "Show me a similar instance where [Scripture] interrupts and then returns, using the word 'lo' [to him], referring back to the preceding section," I would show him: “And the LORD appeared to him (אֵלָיו - eilav) by the terebinths of Mamre...” [Genesis 18:1], [followed by description, then] “And Judah approached him (אֵלָיו - eilav)...” [Genesis 44:18]. And before I speak about the matter of Persia, I will speak about the matter of the angels, for there is no envy among them. And it is written: “He makes peace in His high places” [Job 25:2]. Behold, these are deep secrets (sodot amukkot) that only one in a thousand will understand. And I speak concerning the secret of generations/origins (ha-toladot), the nature of the human soul which is not corporeal, the wisdom of the celestial spheres and their motion, along with the matters of the ministers [planets] and the constellations (mazzalot). And now I will give you hints (remizot), for “it is the glory of God to conceal a matter” [Proverbs 25:2]. And you, apply your heart to understanding, and may God grant you wisdom.