申命记 3:16

תוך הנחל וגבול THE MIDST OF THE BROOK AND THE TERRITORY, i.e., all the brook and in addition, land on its opposite bank. The words therefore are as much as to say, עד "unto” the Brook of Arnon, ועד "and” that which is mentioned as being "unto” (i.e. the Brook itself) is included (by the words תוך הנחל), and even more than this (namely, the גבול, land on the other side of the brook).

וְלָראוּבֵנִ֨י וְלַגָּדִ֜י נָתַ֤תִּי מִן־הַגִּלְעָד֙ וְעַד־נַ֣חַל אַרְנֹ֔ן תּ֥וֹךְ הַנַּ֖חַל וּגְבֻ֑ל וְעַד֙ יַבֹּ֣ק הַנַּ֔חַל גְּב֖וּל בְּנֵ֥י עַמּֽוֹן׃

And to the Re᾽uveni and to the Gadi I gave from Gil῾ad to the wadi Arnon, the middle of the wadi as a border, as far as the torrent of Yabboq, which is the border of the children of ῾Ammon;