וַֽיְהִ֕י כַּֽאֲשֶׁר־בָּ֥א יוֹסֵ֖ף אֶל־אֶחָ֑יו וַיַּפְשִׁ֤יטוּ אֶת־יוֹסֵף֙ אֶת־כֻּתָּנְתּ֔וֹ אֶת־כְּתֹ֥נֶת הַפַּסִּ֖ים אֲשֶׁ֥ר עָלָֽיו׃
And it came to pass, when Joseph was come unto his brethren, that they stripped Joseph of his coat, the coat of many colours that was on him;
Read kabbalistic (mystical) interpretation of Genesis 37:23: and classical mystical sources.