עֲ֭לֵיהֶם עוֹף־הַשָּׁמַ֣יִם יִשְׁכּ֑וֹן מִבֵּ֥ין עֳ֝פָאיִ֗ם יִתְּנוּ־קֽוֹל׃
天上的飛鳥棲息在溪水旁，在枝葉之間啼唱。
Midrash Tehillim
Another interpretation is that "upon them the birds of the sky shall dwell" refers to the nations of the world who gather against Israel and subjugate them, in order to distance them from God. Nevertheless, they do not abandon God, as it is said, "From among the eagles, their voice will be heard." And they declare His unity twice a day with the recitation of the Shema: "Hear, O Israel: The Lord our God, the Lord is one." (Deuteronomy 6:4)