Литература Второго Храма к Берешит 49:21

נַפְתָּלִ֖י אַיָּלָ֣ה שְׁלֻחָ֑ה הַנֹּתֵ֖ן אִמְרֵי־שָֽׁפֶר׃ (ס)

Нафтали - отпущенный зад: он произносит добрые слова.

The Testaments of the Twelve Patriarchs

And I was swift on my feet like the deer, and my father Jacob appointed me for all messages, and as a deer did he give me his blessing.