"... The influence of Isaiah 11:1–4 is particularly significant because Isaiah 11 is used to describe the Messiah in many other texts as well: the king is girded with strength (Psalms of Solomon 17:22) and wisdom (sofia, Psalms of Solomon 17:23), both descriptions taken from Isaiah 11:2. The king’s destruction of the godless nations “with the word of his mouth” (Psalms of Solomon 17:24) is taken from the Septuagint’s translation of Isaiah 11:4. This same phrase returns later in the psalm when we hear that the Messiah “will strike the earth with the word of his mouth” (Psalms of Solomon 17:35). The psalmist adds “forever” to the end of that description in order to emphasize the everlasting reign of the Messiah. The language of Isaiah 11:1–4 continues in the eighteenth psalm’s description of the Messiah, where he is presented as teaching the people of Israel in the ways of righteousness. Righteousness and justice are common traits of the idealized king in several prophetic portraits, both before and after the exile to Babylon ..."

"... “Branch” language once again occasions a reference to the messianic king, although the term is nsr at this point in the Masoretic text (verse 1). The just rule of the Davidic figure is emphasized in terms which may be related to the Psalms of Solomon. In any case, the focus on the cooperation of the righteous, and the reign of peace which will ensue, is openly stated (verses 5-6). Particularly, the element of military triumph comes to expression (verse 10), especially when one bears in mind that 10:27, with its innovative reference to the shattering of the Gentiles by the Messiah, provides the governing context for the messianic teaching in chapter 11 ..."