Commentary for Isaiah 5:26

And He shall raise i.e., the Holy One, blessed be He. an ensign to the nations and signal to them to gather and to come upon them. Raising an ensign (נֵס) is like a long pole (כְּלוּנָס), at the end of which they attach a cloth, [i.e., a flag,] and they climb to the top of a lofty mountain and see it from afar; and that is the sign for people to gather. Comp. (infra 49:22) “And to peoples I will raise My ensign (נִסִּי)”; comp. also (Numbers 21:8), “And set it upon a pole (נֵס),” meaning a pole (כְּלוּנָס), perche in French, but since it is for a sign, it is called נֵס.

And He will lift up, etc. It will be as if He lifted up a banner to all nations to come and to fight against Israel; the same is meant by And will hiss, etc.

And He will whistle sibler in O.F. This too is a sign for gathering.

בזמן קל ═ קל Swiftly; or it is an adjective, attribute to the subject contained in the verb יבא he, a swift one, will come, and this latter explanation is the right one.

from the end of the earth that they should come from afar to besiege Israel.

swiftly he will come The enemy [will come] upon them [swiftly,] as Scripture proceeds to explain.