וְקָרַ֨ב אֹתָ֜ם אֶחָ֧ד אֶל־אֶחָ֛ד לְךָ֖ לְעֵ֣ץ אֶחָ֑ד וְהָי֥וּ לַאֲחָדִ֖ים בְּיָדֶֽךָ׃
and join them for thee one to another into one stick, that they may become one in thy hand.
Read kabbalistic (mystical) interpretation of Ezekiel 37:17: and classical mystical sources.