דברים ז׳:י״ב-ט״ז

והיה עקב תשמעון. אִם הַמִּצְווֹת קַלּוֹת שֶׁאָדָם דָּשׁ בַּעֲקֵבָיו תשמעון.

In the future, as a consequence of your heeding. If, even the lesser commandments which a person [sometimes] treads on with his heels, you will heed, [then] —

ושמר ה' וגו'. יִשְׁמֹר לְךָ הַבְטָחָתוֹ (עי' תנחומא):

Adonoy, your God will preserve. . . He will keep his promise to you.

שגר אלפיך. וַלְדֵי בְקָרְךָ שֶׁהַנְּקֵבָה מְשַׁגֶּרֶת מִמֵּעֶיהָ:

The offspring of your cattle. The young of your cattle which the female casts out from her womb.

ועשתרת צאנך. מְנַחֵם פֵּרֵשׁ "אַבִּירֵי בָשָׁן" (תהילים כ"ב) – מִבְחַר הַצֹּאן, כְּמוֹ "בְּעַשְׁתְּרֹת קַרְנַיִם" (בראשית י"ד), לְשׁוֹן חֹזֶק, וְאֻנְקְלוֹס תִּרְגֵּם "וְעֶדְרֵי עָנָךְ". וְרַבּוֹתֵינוּ אָמְרוּ לָמָּה נִקְרָא שְׁמָם עַשְׁתָּרוֹת? שֶׁמַּעֲשִׁירוֹת אֶת בַּעֲלֵיהֶן (חולין פ"ד):

And the herds of your sheep. Menachem (ben Seruk) explains that אַבִּירֵי בָּשָׁן (the strong bulls of Bashan) means the choicest of the flock, similar to עַשְׁתְּרֹת קַרְנַיִם, which expresses strength. Onkelos translates it as herds of your sheep. Our Sages said: “Why are they called עַשְׁתָּרֹת ? “Because they enrich their owners.”

עקר. שֶׁאֵינוֹ מוֹלִיד:

A sterile male — who cannot beget children.