Numbers 33:55

והיה אשר תותירו מהם THEN IT SHALL COME TO PASS THAT THOSE WHOM YE LEAVE OF THEM shall be a misfortune for you. לשכים AS שכים IN YOUR EYES — as pins which prick out your eyes: the Targum translation of יתדות pins or pegs, is שיכיא (cf. e. g., Exodus 27:19). ולצנינים — The lexicographers explain it in the sense of a hedge of thorns (צנינים is another form of צנים) so that the meaning here is: they will become as something which hedges you in, enclosing and imprisoning you in order that none can go forth nor come in (cf. Rashi on Joshua 23:13) (The meaning is they will hedge you in on all sides בצדיכם. וצררו אתכם — Understand this as the Targum does: (“and they will distress you”).

וְאִם־לֹ֨א תוֹרִ֜ישׁוּ אֶת־יֹשְׁבֵ֣י הָאָ֘רֶץ֮ מִפְּנֵיכֶם֒ וְהָיָה֙ אֲשֶׁ֣ר תּוֹתִ֣ירוּ מֵהֶ֔ם לְשִׂכִּים֙ בְּעֵ֣ינֵיכֶ֔ם וְלִצְנִינִ֖ם בְּצִדֵּיכֶ֑ם וְצָרְר֣וּ אֶתְכֶ֔ם עַל־הָאָ֕רֶץ אֲשֶׁ֥ר אַתֶּ֖ם יֹשְׁבִ֥ים בָּֽהּ׃

But if you will not drive out the inhabitants of the land from before you; then it shall come to pass, that those whom you allow to remain of them shall be as thorns in your eyes, and stings in your sides, and shall vex you in the land wherein you dwell.