Rashi on the Former Prophets

And they too proceded with deception just as the sons of Yaakov dealt with trickery with Chamor, the father of Shechem, who was a Chivite. The people of Givon were descendents of the Chivites, as it is said in this context.
They presented themselves as envoys. They made themselves look like messengers. The word יִצְטַיָרוּ messenger, is from, צִיר “וְצִיר בַּגוֹיִם שְׁלַח” (Ovadiah 1:1) [and a messenger was sent among the nations.] Every word whose root begins with a “צ” (צַדִי ), when used as a reflexive either in the form of מִתְפַּעֵל or נִתְפַּעֵל, is constructed with a “ט” (טֶית) in the middle and separates the root letters of the word, like מַה נִצְטַדָק, (how can we justify ourselves). the root of נִצְטַדָק is צֶדֶק (justice) which he says as נִצְטַדָק. Similarly, וּמִטַל שְׁמַיָא גִשְׁמֵה יִצְטַבַע [His body was wet from the dew of Heaven) The root of יִצְטַבַע is צֶבַע.
Worn-out sacks. To give the appearance that they were coming from a distant land.
And tied together. מְצרָרִים is another expression of מְבוּקָעִים (split), which is an Aramaic expression, “The cleft of the wheat.” of the other, so that the water does not cover it on all sides and it will cause fermentation. “Which makes the wine-skin burst.”

Moldy. “Arson” in old French is an expression of מוֹקֵד, fire or heat. Targum Yonasan also translates נִקֻדִים as כִּסְנִין.

Maybe you really live in our midst. Perhaps you are of those who dwell in the land. said, but it is read וַיאמַר אִישׁ “the man of Yisroel said.” They all spoke together as a single person who had doubts about the truth of their presentation.

We prepared. The word הִצְטַיַדְנוּ is from צֵדָה provision. When we took [the bread] as provisions for our journey.

And the men took of their provisions. They accepted their words. They trapped them with their mouths, as it is said, “But if he did not set an ambush.”