King James Version (KJV)
Then said I, Ah, Lord GOD! behold, I cannot speak: for I {am} a child.
Modern English
Then I said, “Ah, Lord Yahweh! Behold, I don’t know how to speak; for I am a child.”
Hebrew
וָאֹמַ֗ר אֲהָהּ֙ אֲדֹנָ֣י יְהֹוִ֔ה הִנֵּ֥ה לֹא־יָדַ֖עְתִּי דַּבֵּ֑ר כִּי־נַ֖עַר אָנֹֽכִי׃
vaʾomar ʾahah ʾadonay yhovih hineh loʾ-yadaʿtiy daber kiy-naʿar ʾanokiy