OET interlinear NEH 4:11

uW Translation Notes:

Note 1 topic: figures-of-speech / parallelism

לֹ֤א יֵדְעוּ֙ וְ⁠לֹ֣א יִרְא֔וּ עַ֛ד אֲשֶׁר־נָב֥וֹא אֶל־תּוֹכָ֖⁠ם

not know and=not see until (Some words not found in UHB: and=they_said foes_of,our not know and=not see until which/who come to/towards of_them_of,the_midst and,we,will_kill_them and,we_will_put_an_end_to DOM the,work )

These two phrases mean similar things. The enemies use the repetition to emphasize how confident they are of launching a surprise attack. If it would be helpful in your language, you could combine these phrases. Alternate translation: [They will not be expecting an attack until we are right there,] otherwise “before they see us and know we are coming, we will rush down on them”

Note 2 topic: figures-of-speech / metaphor

וְ⁠לֹ֣א יִרְא֔וּ

and=not see

While the enemies could be referring to the Jews literally not seeing them approach, “seeing” could also be a way of describing knowledge, notice, or attention. In that case this expression would mean the same thing as “they will not know.” Alternate translation: [they will not be expecting]