John 6:29

The only work that God requires of people for salvation is faith in His Son (cf. John 3:11-17). The work that Jesus specified was not something physical at all. It was what God requires, namely, trust in Jesus (cf. Romans 3:28). Jesus’ reply was a flat contradiction of the idea that people can earn salvation with their good deeds. This is another of the many great evangelistic verses in John’s Gospel (John 1:12; John 3:16; John 3:36; John 5:24; John 6:47; et al.).