Verse 5
to the Gentiles-- Jesus first extends His announcement of the kingdom of heaven to the Jews, who were eagerly awaiting its arrival. Their eventual rejection of Jesus leads to the Gentile mission, which receives its clearest expression in the ministry of the Apostle Paul (e.g., Acts 9:15). - FSB
Samaritans -- Refers to people of mixed Israelite and foreign descent who lived in the region of Samaria (formerly the northern kingdom of Israel). See note on John 4:9.