בַּצָּרָ֥ה קָרָ֗אתָ וָאֲחַ֫לְּצֶ֥ךָּ אֶ֭עֶנְךָ בְּסֵ֣תֶר רַ֑עַם אֶבְחָֽנְךָ֨ עַל־מֵ֖י מְרִיבָ֣ה סֶֽלָה׃
Sa kagipitan ay tumawag ka, at iniligtas kita; sinagot kita mula sa lihim na dako ng kulog; sinubok kita sa tubig ng Meriba. Selah.
Ibn Ezra
Selah (סֶלָה): Many interpret Selah as "forever/eternally" (le-netzach), but this is not correct (ve-eineno nakhon). And the Aramaic translator (Targum) of the Book of Psalms [working] for others said: That the word Selah has no [inherent semantic] meaning (ta'am), but rather it is for regulating the musical intonation (tikkun ta'am ha-niggun). The proof [cited for this view] is that this word is not found anywhere in the Scripture except in the Prayer of Habakkuk [chapter] three, which is in the manner of Psalms, [written] al shigyonot [a musical term], similar to (Psalm 7:1) "Shiggayon of David," [and various psalms] "For the Leader; with stringed instruments" (La-menatzeach bi-nginotai). [However, Ibn Ezra notes a contradiction or complication with the Targum's usage:] Behold, the interpretation [given by the Targum] will be Selah = "forever" (le-netzach) [in practice, despite the claim it has no meaning]. Yet it is written concerning the waters of Meribah [in (Psalm 81:8)], "Selah", and [this interpretation is problematic because] the strife was only once. Also it is written (Habakkuk 3:3) "and the Holy One from Mount Paran. Selah."
Siftei Chakhamim
You are unlike a king of flesh and blood. This is also part of Moshe’s prayer. But it does not mean that there is none like You, as in, “For there is no power like You, etc. (Tehillim 81:8).” For how does this relate to Moshe’s prayer?