כְּ֭תֵפִי מִשִּׁכְמָ֣ה תִפּ֑וֹל וְ֝אֶזְרֹעִ֗י מִקָּנָ֥ה תִשָּׁבֵֽר׃
biarlah bahuku terlepas dari tulang belikatnya, dan lenganku patah dari tulangnya.
Rashi
from its bone That is the upper bone, which is round as a reed (קנה), and because it is round as a reed, it is called so.