כִּ֣י הַ֭שָּׁתוֹת יֵֽהָרֵס֑וּן צַ֝דִּ֗יק מַה־פָּעָֽל׃
터가 무너지면 의인이 무엇을 할꼬
Siftei Chakhamim
That I will set. We need not ask: The same word, שת , is written in Parshas Vayeitzei: “ וישת his own flocks. . .” (Bereishis 30:40), and in Parshas Va’eira: “Pharaoh . . . did not שת even to this” (Shemos 7:23). Why did Rashi not comment there? The answer is: Here [the shin of] שתי is vocalized with a chirik and no yud, so I might think it does not mean שימי but is a different word, such as, “For they destroyed the שתות (foundation)” (Tehillim 11:3). Or, “ שות שתו (they did battle) at the gates” (Yeshayah 22:7). That is why Rashi needs to explain it here as שימי , although generally, the meaning is obvious. Even after explaining that שתי means שימי , Rashi explains further and says, “that I will set,” because שתי still has two possible meanings. This is similar to תִּתִּי , which has two possible meanings. One is written regarding Lavan, in Parshas Vayetzei (Bereishis 29:19): “Better תִּתִּי (I shall give) her to you.” The other [possible] meaning is written in Parshas Balak (Bamidbar 22:13): “For Hashem has refused לְתִתִּי (to give to me) permission to go with you.” Thus Rashi explains that here, שתי means “I will set” [and not “set for me”]. (Re”m) Alternatively: Rashi explains further and says, “that I will set,” because שתי could mean the past tense, “I already set.” Thus Rashi explains “I will set,” is in the future tense.
Ibn Ezra
They have set [themselves] against me (אֲשֶׁר... שָׁתוּ עָלָי - Asher... shatu alai): [This means 'they arrayed themselves', from the root שׁית/שׁות - sh-y-t/sh-w-t]. It is similar in sense to [meaning] "they fought" (nilchamu). And some interpreted [the verb shatu as related to the noun] the foundations (הַשָּׁתוֹת - ha-shatot, cf. Psalm 11:3), and the meaning [in context] is like nets (reshatot). Therefore [Scripture adds] the word around (saviv).
Ibn Ezra
שתותיה Her foundations.16A. V., In the purposes thereof. Comp. Ps. 11:3. The buildings which they erect to take the fish in.