גַּם־צִפּ֨וֹר ׀ מָ֪צְאָה בַ֡יִת וּדְר֤וֹר ׀ קֵ֥ן לָהּ֮ אֲשֶׁר־שָׁ֪תָה אֶפְרֹ֫חֶ֥יהָ אֶֽת־מִ֭זְבְּחוֹתֶיךָ יְהוָ֣ה צְבָא֑וֹת מַ֝לְכִּ֗י וֵאלֹהָֽי׃
Rashi on Psalms
Even a bird found a house In its ruins, the birds have nested. According to Midrash Aggadah (Mid. Ps. 84:2), it speaks of [the Temple] when it is built, and the bird is the nation of Israel.