《逸周书·卷六·月令解》
这个月，使公牛公马与母牛母马在放牧中交配，把选作祭品的牲畜和马驹牛犊，都记下它们的头数。
是月也，乃合缧牛腾马，游牝于牧。
This month, make the bulls and stallions mate with cows and mares in the pasture, and record the number of livestock and foals selected for sacrifice.