וַיַּ֧עַן אִתַּ֛י אֶת־הַמֶּ֖לֶךְ וַיֹּאמַ֑ר חַי־יְהוָ֗ה וְחֵי֙ אֲדֹנִ֣י הַמֶּ֔לֶךְ כִּ֠י אִם־בִּמְק֞וֹם אֲשֶׁ֥ר יִֽהְיֶה־שָּׁ֣ם ׀ אֲדֹנִ֣י הַמֶּ֗לֶךְ אִם־לְמָ֙וֶת֙ אִם־לְחַיִּ֔ים כִּי־שָׁ֖ם יִהְיֶ֥ה עַבְדֶּֽךָ׃
Aber Ittai antwortete dem Könige: So wahr der Herr lebt und beim Leben meines Herrn, des Königs, an dem Orte, woselbst mein Herr, der König, sein wird, sei es zum Tode, sei es zum Leben, dort wird auch dein Diener sein.
Otzar Midrashim
"For rather wherever milord king will be" (II Samuel 15:21) is written, because Ittai the Gittite spoke with all his heart and all his soul and the force of his words, "For rather, wherever milord king will be, be it to death, or to life, for there your servant will be," and he was righteous in the heart of David as a foreigner. And the verse is missing "rather," because it says "Go back and stay with the king, for you are a foreigner, and an exile to your country" (II Samuel 15:19), thus "rather" is written but not read.