Instances of
Daniel - abstain from food and wine - Daniel 1:8
Daniel - in refusing rewards from Belshazzar - Daniel 5:16, 17
David - insisted on paying full price; would not sacrifice something that cost him nothing - 1 Chronicles 21:24
Esther - risked her life - Esther 4:16
Paul - Consider my life worth nothing - Acts 20:24
Paul - considered everything a loss - Philippians 3:7, 8
Peter - We have left everything to follow you! - Mark 10:28