וְֽאֶת־הַקְּרָשִׁ֞ים תְּצַפֶּ֣ה זָהָ֗ב וְאֶת־טַבְּעֹֽתֵיהֶם֙ תַּעֲשֶׂ֣ה זָהָ֔ב בָּתִּ֖ים לַבְּרִיחִ֑ם וְצִפִּיתָ֥ אֶת־הַבְּרִיחִ֖ם זָהָֽב׃
E cobrirás de ouro as tábuas, e farás seus anéis de ouro como casas para as travessas, e cobrirás de ouro as travessas.
Ramban
AND THEY SHALL BE COUPLED TOGETHER ABOVE THE HEAD OF IT UNTO THE ONE RING. According to Rashi’s interpretation this verse goes back to explain that all the boards should be coupled together beneath, where the boards were cut away on their sides, and they all should be coupled together about the head of it, meaning “of each board.” Or it may be that rosho (the head of it) refers to the top of the Tabernacle. Similarly, [according to Rashi] the expression unto the one ring means of each of the boards. Likewise he explained, thus shall it be for them both,223In the second half of Verse 24 (before us). for the two end boards [for the board at the end of the north side and for the adjacent board in the western wall].
But if this is so, I do not know why Scripture does not explicitly tell us about these rings, saying “and you shall make twenty gold rings” [instead of saying, unto the one ring, which means of each board], seeing that it mentions the cut which he is to make in all the boards.224Verse 17. Moreover, how could Scripture say unto the one ring with the definite article [when it has not mentioned it previously]? Perhaps because it is the customary manner with all houses made of boards to attach them at the top with one ring, Scripture shortened the explanation and said the ring — meaning the one which is known to him and customary. Similarly it said of the bars, and thou shalt make their rings of gold for places for the bolts,225Verse 29. which means the customary [rings] being known to them. A similar case is the expression, their hooks shall be of gold.226Verse 37.
I have found in the Beraitha on the work of the Tabernacle [the following text]: “He cut away the board at the top, a fingerbreadth on one side and a fingerbreadth on the other side, and he placed them [i.e., the two adjacent boards] inside one gold ring in order that they should not move apart from each other, for it is said, And they shall be coupled together beneath, and they shall be coupled together above the head of it unto the one ring. Now it need not have said, unto the one ring; and what does it teach us by saying it? It is to teach us that this is the place where the bolts were inserted.” Accordingly, the verse stating: and they shall be coupled together above the head of it, refers to the head of the board where it was cut away until the place of the upper ring of the bolts, for the incision in the board was to extend as far as the place of the ring. Now Scripture was not particular [concerning these upper parts of the boards] how they should be attached, whether with rings of silver or gold, fixed ones or moveable, or with connecting rods. But the Beraitha states that Moses made rings for that purpose. However, in line with the plain meaning of Scripture this verse refers only to the endboards.
But if this is so, I do not know why Scripture does not explicitly tell us about these rings, saying “and you shall make twenty gold rings” [instead of saying, unto the one ring, which means of each board], seeing that it mentions the cut which he is to make in all the boards.224Verse 17. Moreover, how could Scripture say unto the one ring with the definite article [when it has not mentioned it previously]? Perhaps because it is the customary manner with all houses made of boards to attach them at the top with one ring, Scripture shortened the explanation and said the ring — meaning the one which is known to him and customary. Similarly it said of the bars, and thou shalt make their rings of gold for places for the bolts,225Verse 29. which means the customary [rings] being known to them. A similar case is the expression, their hooks shall be of gold.226Verse 37.
I have found in the Beraitha on the work of the Tabernacle [the following text]: “He cut away the board at the top, a fingerbreadth on one side and a fingerbreadth on the other side, and he placed them [i.e., the two adjacent boards] inside one gold ring in order that they should not move apart from each other, for it is said, And they shall be coupled together beneath, and they shall be coupled together above the head of it unto the one ring. Now it need not have said, unto the one ring; and what does it teach us by saying it? It is to teach us that this is the place where the bolts were inserted.” Accordingly, the verse stating: and they shall be coupled together above the head of it, refers to the head of the board where it was cut away until the place of the upper ring of the bolts, for the incision in the board was to extend as far as the place of the ring. Now Scripture was not particular [concerning these upper parts of the boards] how they should be attached, whether with rings of silver or gold, fixed ones or moveable, or with connecting rods. But the Beraitha states that Moses made rings for that purpose. However, in line with the plain meaning of Scripture this verse refers only to the endboards.