The goad. A goad is carried by the native ploughman today, and was also used in Bible times. It is a wooden rod varying in length from five to seven feet, with a sharp point at one end. With this the farmer can hurry up his slow-moving animals.5
It was such an ox-goad that was used by Shamgar in slaying six hundred Philistines (Judges 3:31). The conviction of sin that came to Saul of Tarsus and led to his conversion was compared to the pricks of an oxgoad: "It is hard for thee to kick against the pricks [goad]" (Acts 26:14).
[Manners And Customs of Bible Lands]