Comentario sobre Génesis 32:15

עזים מאתים ותישים עשרים TWO HUNDRED SHE GOATS AND TWENTY HE GOATS — Two hundred she goats have need of twenty he goats, and so too in the case of all the various species the males were in number according to the need of the females. In Genesis Rabbah 76:7 an inference is made from here as regards the minimum period imperative for the marital duty imposed by the Torah - [for] the men of leisure, every day; [for] the laborers, twice a week; [for] the donkey drivers, once a week; [for] the camel drivers, once in thirty days, [for] the sailors, once in six months. I am unable however to show exactly how this inference is arrived at. But it appears to me that we may learn from here at least that this period is not the same for every person, but that it depends upon the amount of labor imposed upon him by his occupation. As we have found here that ten she goats were given to each he goat, and so [too] to each ram; [as] since they are free from work, their way is to be frequently involved in sexual relations and to impregnate ten females - and once an animal becomes pregnant, it does not accept a male. And [concerning] the bulls that engage in work, it only gave four females to the male; and to the donkey who goes on long journeys, [it gave] two females to the male; and to the camels that go on [even] longer journeys, [it gave] one female to the male.

עזים מאחים, two hundred goats, etc. I have heard from my grandfather of blessed memory that Jacob intended that the total number of animals he sent as a gift to Esau should correspond to the numeriacl value of the letters in the word שעיר (580). Therefore he sent a total of 440 sheep and goats, thirty camels plus a young one each, i.e. a total of 60 camels. Add to this the forty cows and ten bulls, the twenty she-asses and ten donkeys, and you have a total of 580. The word שעיר symbolises Esau's power; the animals Jacob sent him as a gift were supposed to neutralise that power.

עזים מאתים, Yaakov the shepherd knew precisely how many male animals were required to service a flock of female animals to achieve the best results. Sheep and goats have similar requirements in this respect.