2 Timothy 2:3-5 NIV

3 Endure hardship with us1 like a good soldier2 of Christ Jesus.

References for 2 Timothy 2:3

4 No one serving as a soldier gets involved in civilian affairs--he wants to please his commanding officer.
5 Similarly, if anyone competes as an athlete, he does not receive the victor's crown3 unless he competes according to the rules.

References for 2 Timothy 2:5