Page "Ashvamedha" Paragraph 6

After this, the horse, a hornless he-goat, a wild ox ( go-mrga, Bos gavaeus ) are bound to sacrificial stakes near the fire, and seventeen other animals are attached to the horse.

A great number of animals, both tame and wild, are tied to other stakes, according to a commentator 609 in total ( YV VSM 24 consists of an exact enumeration ).