וּלְשַׁ֨עַר הֶֽחָצֵ֜ר מָסָ֣ךְ ׀ עֶשְׂרִ֣ים אַמָּ֗ה תְּכֵ֨לֶת וְאַרְגָּמָ֜ן וְתוֹלַ֧עַת שָׁנִ֛י וְשֵׁ֥שׁ מָשְׁזָ֖ר מַעֲשֵׂ֣ה רֹקֵ֑ם עַמֻּֽדֵיהֶם֙ אַרְבָּעָ֔ה וְאַדְנֵיהֶ֖ם אַרְבָּעָֽה׃
La porte du parvis sera un rideau de vingt coudées, étoffe d’azur, de pourpre, d’écarlate et de lin retors, artistement brodés; elle aura quatre piliers avec quatre socles.
Rashi
חמשים אמה FIFTY CUBITS — These fifty cubits were not all filled in with curtaining, because the entrance was there; there were only fifteen cubits of curtaining at the side of the entrance in the one direction, similarly on the other side thereof. Thus there was left the width of the open space at the entrance consisting of 20 cubits between (between the two lengths of curtaining to the right and left of the entrance). This is what is meant by: (v. 16) “and for the gate of the enclosure a veil of twenty cubits” — a veil serving as a screen for the entrance, twenty cubits long, equal to the breadth of the entrance.
Rashi
ואדניהם נחשת AND THEIR SOCKETS OF COPPER — This statement is intended to include the sockets of the screen — that you should not say: sockets of copper are prescribed only for the columns of the curtaining (v. 17), but the sockets of the screen which are not stated to be of copper (v. 16) may be of another material; this, it appears to me, is the reason why Scripture repeats these words after having used them in v. 17.