כֹּה־אָמַ֨ר יְהוָ֥ה עֹשֶׂ֛ךָ וְיֹצֶרְךָ֥ מִבֶּ֖טֶן יַעְזְרֶ֑ךָּ אַל־תִּירָא֙ עַבְדִּ֣י יַֽעֲקֹ֔ב וִישֻׁר֖וּן בָּחַ֥רְתִּי בֽוֹ׃
造你、從母腹中塑造你、又要幫助你的永恆者如此說：我的僕人雅各，我所揀選的耶書崙啊，不要懼怕！
Ibn Ezra
From the womb. With this expression the prophet alludes to Jacob (comp. Hos. 12:4; in my commentary thereon I shall explain it),1I. E. takes the expression womb literally, and refers it to the incident recorded Gen. 25:26, in the account of the birth of Jacob and Esau. or metaphorically to the time, when Israel was declared to be the people of the Lord.
Ibn Ezra
ישרון Jesurun. It is originally an adjective derived from ישר right; there is no other instance of this form.