Vayeishev #1: Choice garments and goat bits

A theme: sibling[s] of the favorite, beloved son, use goat bits and the son's best garment to misrepresent to the father information about the son. Esav and Yosef.

Esav was beloved by Yaakov because he provided him with game. Bereishit 25:28:

כז וַיִּגְדְּלוּ, הַנְּעָרִים, וַיְהִי עֵשָׂו אִישׁ יֹדֵעַ צַיִד, אִישׁ שָׂדֶה; וְיַעֲקֹב אִישׁ תָּם, יֹשֵׁב אֹהָלִים.	27 And the boys grew; and Esau was a cunning hunter, a man of the field; and Jacob was a quiet man, dwelling in tents.
כח וַיֶּאֱהַב יִצְחָק אֶת-עֵשָׂו, כִּי-צַיִד בְּפִיו; וְרִבְקָה, אֹהֶבֶת אֶת-יַעֲקֹב.	28 Now Isaac loved Esau, because he did eat of his venison; and Rebekah loved Jacob.

Yaakov loved Yosef more than his other children. Bereishit 37:3-4:

ג וְיִשְׂרָאֵל, אָהַב אֶת-יוֹסֵף מִכָּל-בָּנָיו--כִּי-בֶן-זְקֻנִים הוּא, לוֹ; וְעָשָׂה לוֹ, כְּתֹנֶת פַּסִּים.	3 Now Israel loved Joseph more than all his children, because he was the son of his old age; and he made him a coat of many colours.
ד וַיִּרְאוּ אֶחָיו, כִּי-אֹתוֹ אָהַב אֲבִיהֶם מִכָּל-אֶחָיו--וַיִּשְׂנְאוּ, אֹתוֹ; וְלֹא יָכְלוּ, דַּבְּרוֹ לְשָׁלֹם.	4 And when his brethren saw that their father loved him more than all his brethren, they hated him, and could not speak peaceably unto him.

Yaakov pretended to be Esav with the help of Esav's choice garments and some goat skins, to trick his father into beleiving that he is Esav. Bereishit 27:15-17:

טו וַתִּקַּח רִבְקָה אֶת-בִּגְדֵי עֵשָׂו בְּנָהּ הַגָּדֹל, הַחֲמֻדֹת, אֲשֶׁר אִתָּהּ, בַּבָּיִת; וַתַּלְבֵּשׁ אֶת-יַעֲקֹב, בְּנָהּ הַקָּטָן.	15 And Rebekah took the choicest garments of Esau her elder son, which were with her in the house, and put them upon Jacob her younger son.
טז וְאֵת, עֹרֹת גְּדָיֵי הָעִזִּים, הִלְבִּישָׁה, עַל-יָדָיו--וְעַל, חֶלְקַת צַוָּארָיו.	16 And she put the skins of the kids of the goats upon his hands, and upon the smooth of his neck.
יז וַתִּתֵּן אֶת-הַמַּטְעַמִּים וְאֶת-הַלֶּחֶם, אֲשֶׁר עָשָׂתָה, בְּיַד, יַעֲקֹב בְּנָהּ.	17 And she gave the savoury food and the bread, which she had prepared, into the hand of her son Jacob.

Yosef's brothers use Yosef's special coat and dip it in goat blood, to trick their father into thinking Yosef has died. Bereishit 37:31-33:

לא וַיִּקְחוּ, אֶת-כְּתֹנֶת יוֹסֵף; וַיִּשְׁחֲטוּ שְׂעִיר עִזִּים, וַיִּטְבְּלוּ אֶת-הַכֻּתֹּנֶת בַּדָּם.	31 And they took Joseph's coat, and killed a he-goat, and dipped the coat in the blood;
לב וַיְשַׁלְּחוּ אֶת-כְּתֹנֶת הַפַּסִּים, וַיָּבִיאוּ אֶל-אֲבִיהֶם, וַיֹּאמְרוּ, זֹאת מָצָאנוּ: הַכֶּר-נָא, הַכְּתֹנֶת בִּנְךָ הִוא--אִם-לֹא.	32 and they sent the coat of many colours, and they brought it to their father; and said: 'This have we found. Know now whether it is thy son's coat or not.'
לג וַיַּכִּירָהּ וַיֹּאמֶר כְּתֹנֶת בְּנִי, חַיָּה רָעָה אֲכָלָתְהוּ; טָרֹף טֹרַף, יוֹסֵף.	33 And he knew it, and said: 'It is my son's coat; an evil beast hath devoured him; Joseph is without doubt torn in pieces.'

Perhaps this, in part, is what motivates those who identify Yosef's coat with Esav's choice garments - the same ones taken by Esav from Nimrod.