פירוש על שופטים 3:31

With a goad. A saddle spur, "aiguillon" in old French.

In the year that Ehud died, Shmagar became a judge and he died in that year

Ox Goad: this is the stick that at the top of it has the eye of a needle stuck in it and its called a spur. With it you teach and scare the cattle to plow

Its to teach that this his salvation was not a great one as Ehud's was. but in any place, he did also made a salvation.