בַּיּוֹם֙ הָעֲשִׂירִ֔י נָשִׂ֖יא לִבְנֵ֣י דָ֑ן אֲחִיעֶ֖זֶר בֶּן־עַמִּישַׁדָּֽי׃
On the tenth day Ahiezer the son of Ammishaddai, prince of the children of Dan:
Read kabbalistic (mystical) interpretation of Numbers 7:66: and classical mystical sources.