וַיִּשָּׂאֻ֗הוּ מִבֵּ֤ית אֲבִֽינָדָב֙ אֲשֶׁ֣ר בַּגִּבְעָ֔ה עִ֖ם אֲר֣וֹן הָאֱלֹהִ֑ים וְאַחְי֕וֹ הֹלֵ֖ךְ לִפְנֵ֥י הָאָרֽוֹן׃
And they brought it out of the house of Abinadab, which was in the hill, with the ark of God, and Ahio went before the ark.
Read kabbalistic (mystical) interpretation of II Samuel 6:4: and classical mystical sources.