Whatever preacher told you this did not get his instructions from the Bible.
This is the opposite of what God requires for salvation according to His Word
Show me where anything more is required.
“Believe in the Lord Jesus Christ and you will be saved” (Acts 16:30-31).
"For “everyone who calls on the name of the Lord will be saved.” (Romans 10:13)
“For if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. (Romans 10:9-11)
"For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works," (Ephesians 2:8-10)
