The parable of the Good Samaritan is a parable

Parables of Jesus

The parables of Jesus can be found in all the Canonical gospels as well as in some of the non-canonical gospels but are located mainly within the three synoptic gospels. They represent a key part of the teachings of Jesus, forming approximately one third of his recorded teachings...

 told by Jesus

Jesus

Jesus of Nazareth , commonly referred to as Jesus Christ or simply as Jesus or Christ, is the central figure of Christianity...

 and is mentioned in only one of the Canonical gospels. According to the Gospel of Luke

Gospel of Luke

The Gospel According to Luke , commonly shortened to the Gospel of Luke or simply Luke, is the third and longest of the four canonical Gospels. This synoptic gospel is an account of the life and ministry of Jesus of Nazareth. It details his story from the events of his birth to his Ascension.The...

  a traveller (who may or may not be Jewish) is beaten, robbed, and left half dead along the road. First a priest

Kohen

A Kohen is the Hebrew word for priest. Jewish Kohens are traditionally believed and halachically required to be of direct patrilineal descent from the Biblical Aaron....

 and then a Levite

Levite

In Jewish tradition, a Levite is a member of the Hebrew tribe of Levi. When Joshua led the Israelites into the land of Canaan, the Levites were the only Israelite tribe that received cities but were not allowed to be landowners "because the Lord the God of Israel himself is their inheritance"...

 come by, but both avoid the man. Finally, a Samaritan

Samaritan

The Samaritans are an ethnoreligious group of the Levant. Religiously, they are the adherents to Samaritanism, an Abrahamic religion closely related to Judaism...

 comes by. Samaritans and Jews generally despised each other, but the Samaritan helps the injured man.