בַּיּוֹם֙ הַשְּׁבִיעִ֔י נָשִׂ֖יא לִבְנֵ֣י אֶפְרָ֑יִם אֱלִֽישָׁמָ֖ע בֶּן־עַמִּיהֽוּד׃
On the seventh day Elishama the son of Ammihud, prince of the children of Ephraim:
Read kabbalistic (mystical) interpretation of Numbers 7:48: and classical mystical sources.