ימים. שְׁנַיִם:
ימים [WHEN THOU SHALT BESIEGE A CITY] ימים DAYS — The plural implies at least two days,
רבים. שְׁלוֹשָׁה, מִכָּאן אָמְרוּ אֵין צָרִין עַל עַיָּרוֹת שֶׁל גּוֹיִם פָּחוֹת מִשְּׁלוֹשָׁה יָמִים קֹדֶם לַשַּׁבָּת, וְלִמֵּד שֶׁפּוֹתֵחַ בְּשָׁלוֹם שְׁנַיִם אוֹ שְׁלוֹשָׁה יָמִים, וְכֵן הוּא אוֹמֵר (שמואל ב א') וַיֵּשֶׁב דָּוִד בְּצִקְלָג יָמִים שְׁנָיִם (ספרי); וּבְמִלְחֶמֶת הָרְשׁוּת הַכָּתוּב מְדַבֵּר:
רבים MANY must imply at least three days (cf. Rashi on Leviticus 15:25). From here they (the Rabbis) derived the law that the siege of a heathen city must not be commenced less than three days before the Sabbath, and it (this verse) teaches you that the opening up (the invitation to make) peace (v. 10) must be repeated two or three days, for so it states, (II Samuel 1:1) “And David abode two days (ימים שנים) in Ziklag” (Sifrei Devarim 200:4; Shabbat 19a). And Scripture is speaking here of a war which is not obligatory upon them (Sifrei Devarim 200:1).
כי האדם עץ השדה. הֲרֵי כִּי מְשַׁמֵּשׁ בִּלְשׁוֹן דִּלְמָא, שֶׁמָּא הָאָדָם עֵץ הַשָּׂדֶה לְהִכָּנֵס בְּתוֹךְ הַמָּצוֹר מִפָּנֶיךָ לְהִתְיַסֵּר בְּיִסּוּרֵי רָעָב וְצָמָא כְּאַנְשֵׁי הָעִיר? לָמָּה תַּשְׁחִיתֶנּוּ?:
כי האדם עץ השדה FOR IS THE TREE OF THE FIELD A MAN [THAT IT SHOULD BE BESIEGED BY THEE]? — כי has here the meaning of “possibly”, “perhaps” (cf. Rashi on Exodus 23:5) — is the tree of the field perhaps a man who is able to withdraw within the besieged city from before you, that it should be chastised by the suffering of famine and thirst like the inhabitants of the city? Why should you destroy it?