כְּרֵֽעַ־כְּאָ֣ח לִ֭י הִתְהַלָּ֑כְתִּי כַּאֲבֶל־אֵ֝֗ם קֹדֵ֥ר שַׁחֽוֹתִי׃
내가 나의 친구와 형제에게 행함 같이 저희에게 행하였으며 내가 굽히고 슬퍼하기를 모친을 곡함 같이 하였도다
Ibn Ezra
כסוס כעגור═כסוס עגור. Comp. כרע כאח לי as though he had been my friend, my brother (Ps. 35:14). In the same way ככבש כאלוף ═ אלוף ככבש like a lamb, like an ox (Jer. 14:19). סיס and עגור are names of birds, a crane, a swallow. So did I chatter. The patient in his heavy illness mutters and speaks what no one is able to understand.