Genesis 37:31

שעיר עזים A KID OF THE GOATS — its blood resembles that of a human being (Genesis Rabbah 84:19). הַכֻּתֹּנֶת THE COAT — This is the form of the noun in the absolute state, but when it is in the construct state — as e.g., Joseph’s coat”, “the coat of many colours”, “the coat of linen”, — it is punctuated as כְּתֹנֶת.

וַיִּקְח֖וּ אֶת־כְּתֹ֣נֶת יוֹסֵ֑ף וַֽיִּשְׁחֲטוּ֙ שְׂעִ֣יר עִזִּ֔ים וַיִּטְבְּל֥וּ אֶת־הַכֻּתֹּ֖נֶת בַּדָּֽם׃

And they took Yosef’s coat, and killed a kid of the goats, and dipped the coat in the blood;