Rabbi Tanchuma opened [his discourse] in the name of R. Judan [who] said in the name of R. Ayyevu (Ps. 32:9), “’Do not be like a horse or a mule, without understanding….’<sup class="footnote-marker">25</sup><i class="footnote"><i>PRK</i> 3:3; cf. <i>PR</i> 12:3.</i> Six things are stated about the horse:<sup class="footnote-marker">26</sup><i class="footnote"><i>Pes</i>. 113b.</i> (1) It eats much and (2) excretes little. (3) It loves promiscuity, (4) loves battle, (5) has a haughty spirit, (6) and abhors sleep. Moreover, there are also some who say [that] the horse wants to kill its master in battle. (Ibid.:) ‘Do not be like a horse or a mule.’ The Holy One, blessed be He, said to Israel, ‘”Do not be like a horse of a mule,’ that has no understanding. In the case of a horse, when one adorns it or feeds it, it obstructs and bends its neck and kicks him; and so too, the mule. But you are not to be like that. Rather be careful to repay the good person for his goodness and to repay the evil person for his evil.’ Good to the good [is] (Deut. 23:8), ‘You shall not despise the Edomite, as he is your brother.’ Bad to the bad [is] (Deut. 25:17), ‘Remember what Amalek did to you.’”