Exodus 25:11

מבית ומחוץ תצפנו WITHIN AND WITHOUT SHALT THOU OVERLAY IT — Bezalel made three arks, two of gold and one of wood, each having four walls (sides) and a bottom, being, however, open at the top. He put the wooden ark into the larger golden one and the smaller golden one into that of wood and covered its upper rim (that of the wooden ark) with gold; consequently it can be said that the wooden ark was overlaid with gold within and without (Yoma 72b; Jerusalem Talmud Shekalim 6:1). זר זהב A BORDER OF GOLD — a crown-like ornament encompassed it (the ark) round about above its rim, for he (Bezalel) made the outer ark which was of gold higher than the inner ones so that it stood up over against the thickness of the cover which was made for it and even somewhat beyond it (Yoma 72b). Now when the cover lay upon the thickness of the sides of the two smaller arks the crown-like ledge rose a little above the entire thickness of the cover. It was a symbol of the “crown of the Torah” which was placed within that ark (Exodus Rabbah 34b).

And thou shalt overlay it with pure gold, inside and outside shalt thou overlay it, and shalt make upon it a rim of gold round about.

וְצִפִּיתָ֤ אֹתוֹ֙ זָהָ֣ב טָה֔וֹר מִבַּ֥יִת וּמִח֖וּץ תְּצַפֶּ֑נּוּ וְעָשִׂ֧יתָ עָלָ֛יו זֵ֥ר זָהָ֖ב סָבִֽיב׃